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sys/i386/acpica/madt.c
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1 /*- 2 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 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 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/smp.h> 39 40 #include <vm/vm.h> 41 #include <vm/vm_param.h> 42 #include <vm/pmap.h> 43 44 #include <machine/apicreg.h> 45 #include <machine/frame.h> 46 #include <machine/intr_machdep.h> 47 #include <machine/apicvar.h> 48 #include <machine/md_var.h> 49 #include <machine/specialreg.h> 50 51 #include <contrib/dev/acpica/acpi.h> 52 #include <contrib/dev/acpica/actables.h> 53 #include <dev/acpica/acpivar.h> 54 #include <dev/pci/pcivar.h> 55 56 typedef void madt_entry_handler(ACPI_SUBTABLE_HEADER *entry, void *arg); 57 58 /* These two arrays are indexed by APIC IDs. */ 59 struct ioapic_info { 60 void *io_apic; 61 UINT32 io_vector; 62 } ioapics[MAX_APIC_ID + 1]; 63 64 struct lapic_info { 65 u_int la_enabled:1; 66 u_int la_acpi_id:8; 67 } lapics[MAX_APIC_ID + 1]; 68 69 static int madt_found_sci_override; 70 static ACPI_TABLE_MADT *madt; 71 static vm_paddr_t madt_physaddr; 72 static vm_offset_t madt_length; 73 74 MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items"); 75 76 static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source); 77 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source); 78 static int madt_find_cpu(u_int acpi_id, u_int *apic_id); 79 static int madt_find_interrupt(int intr, void **apic, u_int *pin); 80 static void *madt_map(vm_paddr_t pa, int offset, vm_offset_t length); 81 static void *madt_map_table(vm_paddr_t pa, int offset, const char *sig); 82 static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg); 83 static void madt_parse_interrupt_override( 84 ACPI_MADT_INTERRUPT_OVERRIDE *intr); 85 static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, 86 void *arg __unused); 87 static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi); 88 static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi); 89 static int madt_probe(void); 90 static int madt_probe_cpus(void); 91 static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, 92 void *arg __unused); 93 static int madt_probe_table(vm_paddr_t address); 94 static void madt_register(void *dummy); 95 static int madt_setup_local(void); 96 static int madt_setup_io(void); 97 static void madt_unmap(void *data, vm_offset_t length); 98 static void madt_unmap_table(void *table); 99 static void madt_walk_table(madt_entry_handler *handler, void *arg); 100 101 static struct apic_enumerator madt_enumerator = { 102 "MADT", 103 madt_probe, 104 madt_probe_cpus, 105 madt_setup_local, 106 madt_setup_io 107 }; 108 109 /* 110 * Code to abuse the crashdump map to map in the tables for the early 111 * probe. We cheat and make the following assumptions about how we 112 * use this KVA: pages 0 and 1 are used to map in the header of each 113 * table found via the RSDT or XSDT and pages 2 to n are used to map 114 * in the RSDT or XSDT. We have to use 2 pages for the table headers 115 * in case a header spans a page boundary. The offset is in pages; 116 * the length is in bytes. 117 */ 118 static void * 119 madt_map(vm_paddr_t pa, int offset, vm_offset_t length) 120 { 121 vm_offset_t va, off; 122 void *data; 123 124 off = pa & PAGE_MASK; 125 length = roundup(length + off, PAGE_SIZE); 126 pa = pa & PG_FRAME; 127 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 128 (offset * PAGE_SIZE); 129 data = (void *)(va + off); 130 length -= PAGE_SIZE; 131 while (length > 0) { 132 va += PAGE_SIZE; 133 pa += PAGE_SIZE; 134 length -= PAGE_SIZE; 135 pmap_kenter(va, pa); 136 invlpg(va); 137 } 138 return (data); 139 } 140 141 static void 142 madt_unmap(void *data, vm_offset_t length) 143 { 144 vm_offset_t va, off; 145 146 va = (vm_offset_t)data; 147 off = va & PAGE_MASK; 148 length = roundup(length + off, PAGE_SIZE); 149 va &= ~PAGE_MASK; 150 while (length > 0) { 151 pmap_kremove(va); 152 invlpg(va); 153 va += PAGE_SIZE; 154 length -= PAGE_SIZE; 155 } 156 } 157 158 static void * 159 madt_map_table(vm_paddr_t pa, int offset, const char *sig) 160 { 161 ACPI_TABLE_HEADER *header; 162 vm_offset_t length; 163 void *table; 164 165 header = madt_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 166 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 167 madt_unmap(header, sizeof(ACPI_TABLE_HEADER)); 168 return (NULL); 169 } 170 length = header->Length; 171 madt_unmap(header, sizeof(ACPI_TABLE_HEADER)); 172 table = madt_map(pa, offset, length); 173 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 174 if (bootverbose) 175 printf("MADT: Failed checksum for table %s\n", sig); 176 madt_unmap(table, length); 177 return (NULL); 178 } 179 return (table); 180 } 181 182 static void 183 madt_unmap_table(void *table) 184 { 185 ACPI_TABLE_HEADER *header; 186 187 header = (ACPI_TABLE_HEADER *)table; 188 madt_unmap(table, header->Length); 189 } 190 191 /* 192 * Look for an ACPI Multiple APIC Description Table ("APIC") 193 */ 194 static int 195 madt_probe(void) 196 { 197 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 198 ACPI_TABLE_RSDP *rsdp; 199 ACPI_TABLE_RSDT *rsdt; 200 ACPI_TABLE_XSDT *xsdt; 201 int i, count; 202 203 if (resource_disabled("acpi", 0)) 204 return (ENXIO); 205 206 /* 207 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 208 * calls pmap_mapbios() to find the RSDP, we assume that we can use 209 * pmap_mapbios() to map the RSDP. 210 */ 211 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 212 return (ENXIO); 213 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 214 if (rsdp == NULL) { 215 if (bootverbose) 216 printf("MADT: Failed to map RSDP\n"); 217 return (ENXIO); 218 } 219 220 /* 221 * For ACPI >= 2.0, use the XSDT if it is available. 222 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 1 223 * in the crashdump area. Page 0 is used to map in the 224 * headers of candidate ACPI tables. 225 */ 226 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 227 /* 228 * AcpiOsGetRootPointer only verifies the checksum for 229 * the version 1.0 portion of the RSDP. Version 2.0 has 230 * an additional checksum that we verify first. 231 */ 232 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 233 if (bootverbose) 234 printf("MADT: RSDP failed extended checksum\n"); 235 return (ENXIO); 236 } 237 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 2, 238 ACPI_SIG_XSDT); 239 if (xsdt == NULL) { 240 if (bootverbose) 241 printf("MADT: Failed to map XSDT\n"); 242 return (ENXIO); 243 } 244 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 245 sizeof(UINT64); 246 for (i = 0; i < count; i++) 247 if (madt_probe_table(xsdt->TableOffsetEntry[i])) 248 break; 249 madt_unmap_table(xsdt); 250 } else { 251 rsdt = madt_map_table(rsdp->RsdtPhysicalAddress, 2, 252 ACPI_SIG_RSDT); 253 if (rsdt == NULL) { 254 if (bootverbose) 255 printf("MADT: Failed to map RSDT\n"); 256 return (ENXIO); 257 } 258 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 259 sizeof(UINT32); 260 for (i = 0; i < count; i++) 261 if (madt_probe_table(rsdt->TableOffsetEntry[i])) 262 break; 263 madt_unmap_table(rsdt); 264 } 265 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 266 if (madt_physaddr == 0) { 267 if (bootverbose) 268 printf("MADT: No MADT table found\n"); 269 return (ENXIO); 270 } 271 if (bootverbose) 272 printf("MADT: Found table at 0x%jx\n", 273 (uintmax_t)madt_physaddr); 274 275 /* 276 * Verify that we can map the full table and that its checksum is 277 * correct, etc. 278 */ 279 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT); 280 if (madt == NULL) 281 return (ENXIO); 282 madt_unmap_table(madt); 283 madt = NULL; 284 285 return (0); 286 } 287 288 /* 289 * See if a given ACPI table is the MADT. 290 */ 291 static int 292 madt_probe_table(vm_paddr_t address) 293 { 294 ACPI_TABLE_HEADER *table; 295 296 table = madt_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 297 if (table == NULL) { 298 if (bootverbose) 299 printf("MADT: Failed to map table at 0x%jx\n", 300 (uintmax_t)address); 301 return (0); 302 } 303 if (bootverbose) 304 printf("Table '%.4s' at 0x%jx\n", table->Signature, 305 (uintmax_t)address); 306 307 if (strncmp(table->Signature, ACPI_SIG_MADT, ACPI_NAME_SIZE) != 0) { 308 madt_unmap(table, sizeof(ACPI_TABLE_HEADER)); 309 return (0); 310 } 311 madt_physaddr = address; 312 madt_length = table->Length; 313 madt_unmap(table, sizeof(ACPI_TABLE_HEADER)); 314 return (1); 315 } 316 317 /* 318 * Run through the MP table enumerating CPUs. 319 */ 320 static int 321 madt_probe_cpus(void) 322 { 323 324 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT); 325 KASSERT(madt != NULL, ("Unable to re-map MADT")); 326 madt_walk_table(madt_probe_cpus_handler, NULL); 327 madt_unmap_table(madt); 328 madt = NULL; 329 return (0); 330 } 331 332 /* 333 * Initialize the local APIC on the BSP. 334 */ 335 static int 336 madt_setup_local(void) 337 { 338 339 madt = pmap_mapbios(madt_physaddr, madt_length); 340 lapic_init(madt->Address); 341 printf("ACPI APIC Table: <%.*s %.*s>\n", 342 (int)sizeof(madt->Header.OemId), madt->Header.OemId, 343 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId); 344 345 /* 346 * We ignore 64-bit local APIC override entries. Should we 347 * perhaps emit a warning here if we find one? 348 */ 349 return (0); 350 } 351 352 /* 353 * Enumerate I/O APICs and setup interrupt sources. 354 */ 355 static int 356 madt_setup_io(void) 357 { 358 void *ioapic; 359 u_int pin; 360 int i; 361 362 /* Try to initialize ACPI so that we can access the FADT. */ 363 i = acpi_Startup(); 364 if (ACPI_FAILURE(i)) { 365 printf("MADT: ACPI Startup failed with %s\n", 366 AcpiFormatException(i)); 367 printf("Try disabling either ACPI or apic support.\n"); 368 panic("Using MADT but ACPI doesn't work"); 369 } 370 371 /* First, we run through adding I/O APIC's. */ 372 madt_walk_table(madt_parse_apics, NULL); 373 374 /* Second, we run through the table tweaking interrupt sources. */ 375 madt_walk_table(madt_parse_ints, NULL); 376 377 /* 378 * If there was not an explicit override entry for the SCI, 379 * force it to use level trigger and active-low polarity. 380 */ 381 if (!madt_found_sci_override) { 382 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic, 383 &pin) != 0) 384 printf("MADT: Could not find APIC for SCI IRQ %u\n", 385 AcpiGbl_FADT.SciInterrupt); 386 else { 387 printf( 388 "MADT: Forcing active-low polarity and level trigger for SCI\n"); 389 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW); 390 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL); 391 } 392 } 393 394 /* Third, we register all the I/O APIC's. */ 395 for (i = 0; i <= MAX_APIC_ID; i++) 396 if (ioapics[i].io_apic != NULL) 397 ioapic_register(ioapics[i].io_apic); 398 399 /* Finally, we throw the switch to enable the I/O APIC's. */ 400 acpi_SetDefaultIntrModel(ACPI_INTR_APIC); 401 402 return (0); 403 } 404 405 static void 406 madt_register(void *dummy __unused) 407 { 408 409 apic_register_enumerator(&madt_enumerator); 410 } 411 SYSINIT(madt_register, SI_SUB_CPU - 1, SI_ORDER_SECOND, madt_register, NULL); 412 413 /* 414 * Call the handler routine for each entry in the MADT table. 415 */ 416 static void 417 madt_walk_table(madt_entry_handler *handler, void *arg) 418 { 419 ACPI_SUBTABLE_HEADER *entry; 420 u_char *p, *end; 421 422 end = (u_char *)(madt) + madt->Header.Length; 423 for (p = (u_char *)(madt + 1); p < end; ) { 424 entry = (ACPI_SUBTABLE_HEADER *)p; 425 handler(entry, arg); 426 p += entry->Length; 427 } 428 } 429 430 static void 431 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) 432 { 433 ACPI_MADT_LOCAL_APIC *proc; 434 struct lapic_info *la; 435 436 switch (entry->Type) { 437 case ACPI_MADT_TYPE_LOCAL_APIC: 438 /* 439 * The MADT does not include a BSP flag, so we have to 440 * let the MP code figure out which CPU is the BSP on 441 * its own. 442 */ 443 proc = (ACPI_MADT_LOCAL_APIC *)entry; 444 if (bootverbose) 445 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n", 446 proc->Id, proc->ProcessorId, 447 (proc->LapicFlags & ACPI_MADT_ENABLED) ? 448 "enabled" : "disabled"); 449 if (!(proc->LapicFlags & ACPI_MADT_ENABLED)) 450 break; 451 if (proc->Id > MAX_APIC_ID) 452 panic("%s: CPU ID %u too high", __func__, proc->Id); 453 la = &lapics[proc->Id]; 454 KASSERT(la->la_enabled == 0, 455 ("Duplicate local APIC ID %u", proc->Id)); 456 la->la_enabled = 1; 457 la->la_acpi_id = proc->ProcessorId; 458 lapic_create(proc->Id, 0); 459 break; 460 } 461 } 462 463 464 /* 465 * Add an I/O APIC from an entry in the table. 466 */ 467 static void 468 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 469 { 470 ACPI_MADT_IO_APIC *apic; 471 472 switch (entry->Type) { 473 case ACPI_MADT_TYPE_IO_APIC: 474 apic = (ACPI_MADT_IO_APIC *)entry; 475 if (bootverbose) 476 printf( 477 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n", 478 apic->Id, apic->GlobalIrqBase, 479 (void *)(uintptr_t)apic->Address); 480 if (apic->Id > MAX_APIC_ID) 481 panic("%s: I/O APIC ID %u too high", __func__, 482 apic->Id); 483 if (ioapics[apic->Id].io_apic != NULL) 484 panic("%s: Double APIC ID %u", __func__, apic->Id); 485 if (apic->GlobalIrqBase >= FIRST_MSI_INT) { 486 printf("MADT: Ignoring bogus I/O APIC ID %u", apic->Id); 487 break; 488 } 489 ioapics[apic->Id].io_apic = ioapic_create(apic->Address, 490 apic->Id, apic->GlobalIrqBase); 491 ioapics[apic->Id].io_vector = apic->GlobalIrqBase; 492 break; 493 default: 494 break; 495 } 496 } 497 498 /* 499 * Determine properties of an interrupt source. Note that for ACPI these 500 * functions are only used for ISA interrupts, so we assume ISA bus values 501 * (Active Hi, Edge Triggered) for conforming values except for the ACPI 502 * SCI for which we use Active Lo, Level Triggered. 503 */ 504 static enum intr_polarity 505 interrupt_polarity(UINT16 IntiFlags, UINT8 Source) 506 { 507 508 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) { 509 case ACPI_MADT_POLARITY_CONFORMS: 510 if (Source == AcpiGbl_FADT.SciInterrupt) 511 return (INTR_POLARITY_LOW); 512 else 513 return (INTR_POLARITY_HIGH); 514 case ACPI_MADT_POLARITY_ACTIVE_HIGH: 515 return (INTR_POLARITY_HIGH); 516 case ACPI_MADT_POLARITY_ACTIVE_LOW: 517 return (INTR_POLARITY_LOW); 518 default: 519 panic("Bogus Interrupt Polarity"); 520 } 521 } 522 523 static enum intr_trigger 524 interrupt_trigger(UINT16 IntiFlags, UINT8 Source) 525 { 526 527 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) { 528 case ACPI_MADT_TRIGGER_CONFORMS: 529 if (Source == AcpiGbl_FADT.SciInterrupt) 530 return (INTR_TRIGGER_LEVEL); 531 else 532 return (INTR_TRIGGER_EDGE); 533 case ACPI_MADT_TRIGGER_EDGE: 534 return (INTR_TRIGGER_EDGE); 535 case ACPI_MADT_TRIGGER_LEVEL: 536 return (INTR_TRIGGER_LEVEL); 537 default: 538 panic("Bogus Interrupt Trigger Mode"); 539 } 540 } 541 542 /* 543 * Find the local APIC ID associated with a given ACPI Processor ID. 544 */ 545 static int 546 madt_find_cpu(u_int acpi_id, u_int *apic_id) 547 { 548 int i; 549 550 for (i = 0; i <= MAX_APIC_ID; i++) { 551 if (!lapics[i].la_enabled) 552 continue; 553 if (lapics[i].la_acpi_id != acpi_id) 554 continue; 555 *apic_id = i; 556 return (0); 557 } 558 return (ENOENT); 559 } 560 561 /* 562 * Find the IO APIC and pin on that APIC associated with a given global 563 * interrupt. 564 */ 565 static int 566 madt_find_interrupt(int intr, void **apic, u_int *pin) 567 { 568 int i, best; 569 570 best = -1; 571 for (i = 0; i <= MAX_APIC_ID; i++) { 572 if (ioapics[i].io_apic == NULL || 573 ioapics[i].io_vector > intr) 574 continue; 575 if (best == -1 || 576 ioapics[best].io_vector < ioapics[i].io_vector) 577 best = i; 578 } 579 if (best == -1) 580 return (ENOENT); 581 *apic = ioapics[best].io_apic; 582 *pin = intr - ioapics[best].io_vector; 583 if (*pin > 32) 584 printf("WARNING: Found intpin of %u for vector %d\n", *pin, 585 intr); 586 return (0); 587 } 588 589 /* 590 * Parse an interrupt source override for an ISA interrupt. 591 */ 592 static void 593 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr) 594 { 595 void *new_ioapic, *old_ioapic; 596 u_int new_pin, old_pin; 597 enum intr_trigger trig; 598 enum intr_polarity pol; 599 char buf[64]; 600 601 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 && 602 intr->GlobalIrq == 2) { 603 if (bootverbose) 604 printf("MADT: Skipping timer override\n"); 605 return; 606 } 607 if (bootverbose) 608 printf("MADT: Interrupt override: source %u, irq %u\n", 609 intr->SourceIrq, intr->GlobalIrq); 610 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero")); 611 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) { 612 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n", 613 intr->GlobalIrq, intr->SourceIrq); 614 return; 615 } 616 617 /* 618 * Lookup the appropriate trigger and polarity modes for this 619 * entry. 620 */ 621 trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq); 622 pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq); 623 624 /* 625 * If the SCI is identity mapped but has edge trigger and 626 * active-hi polarity or the force_sci_lo tunable is set, 627 * force it to use level/lo. 628 */ 629 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) { 630 madt_found_sci_override = 1; 631 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) { 632 if (tolower(buf[0]) == 'e') 633 trig = INTR_TRIGGER_EDGE; 634 else if (tolower(buf[0]) == 'l') 635 trig = INTR_TRIGGER_LEVEL; 636 else 637 panic( 638 "Invalid trigger %s: must be 'edge' or 'level'", 639 buf); 640 printf("MADT: Forcing SCI to %s trigger\n", 641 trig == INTR_TRIGGER_EDGE ? "edge" : "level"); 642 } 643 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) { 644 if (tolower(buf[0]) == 'h') 645 pol = INTR_POLARITY_HIGH; 646 else if (tolower(buf[0]) == 'l') 647 pol = INTR_POLARITY_LOW; 648 else 649 panic( 650 "Invalid polarity %s: must be 'high' or 'low'", 651 buf); 652 printf("MADT: Forcing SCI to active %s polarity\n", 653 pol == INTR_POLARITY_HIGH ? "high" : "low"); 654 } 655 } 656 657 /* Remap the IRQ if it is mapped to a different interrupt vector. */ 658 if (intr->SourceIrq != intr->GlobalIrq) { 659 /* 660 * If the SCI is remapped to a non-ISA global interrupt, 661 * then override the vector we use to setup and allocate 662 * the interrupt. 663 */ 664 if (intr->GlobalIrq > 15 && 665 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) 666 acpi_OverrideInterruptLevel(intr->GlobalIrq); 667 else 668 ioapic_remap_vector(new_ioapic, new_pin, 669 intr->SourceIrq); 670 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic, 671 &old_pin) != 0) 672 printf("MADT: Could not find APIC for source IRQ %u\n", 673 intr->SourceIrq); 674 else if (ioapic_get_vector(old_ioapic, old_pin) == 675 intr->SourceIrq) 676 ioapic_disable_pin(old_ioapic, old_pin); 677 } 678 679 /* Program the polarity and trigger mode. */ 680 ioapic_set_triggermode(new_ioapic, new_pin, trig); 681 ioapic_set_polarity(new_ioapic, new_pin, pol); 682 } 683 684 /* 685 * Parse an entry for an NMI routed to an IO APIC. 686 */ 687 static void 688 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi) 689 { 690 void *ioapic; 691 u_int pin; 692 693 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) { 694 printf("MADT: Could not find APIC for vector %u\n", 695 nmi->GlobalIrq); 696 return; 697 } 698 699 ioapic_set_nmi(ioapic, pin); 700 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 701 ioapic_set_triggermode(ioapic, pin, 702 interrupt_trigger(nmi->IntiFlags, 0)); 703 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 704 ioapic_set_polarity(ioapic, pin, 705 interrupt_polarity(nmi->IntiFlags, 0)); 706 } 707 708 /* 709 * Parse an entry for an NMI routed to a local APIC LVT pin. 710 */ 711 static void 712 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi) 713 { 714 u_int apic_id, pin; 715 716 if (nmi->ProcessorId == 0xff) 717 apic_id = APIC_ID_ALL; 718 else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) { 719 if (bootverbose) 720 printf("MADT: Ignoring local NMI routed to " 721 "ACPI CPU %u\n", nmi->ProcessorId); 722 return; 723 } 724 if (nmi->Lint == 0) 725 pin = LVT_LINT0; 726 else 727 pin = LVT_LINT1; 728 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI); 729 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 730 lapic_set_lvt_triggermode(apic_id, pin, 731 interrupt_trigger(nmi->IntiFlags, 0)); 732 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS)) 733 lapic_set_lvt_polarity(apic_id, pin, 734 interrupt_polarity(nmi->IntiFlags, 0)); 735 } 736 737 /* 738 * Parse interrupt entries. 739 */ 740 static void 741 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 742 { 743 744 switch (entry->Type) { 745 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: 746 madt_parse_interrupt_override( 747 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry); 748 break; 749 case ACPI_MADT_TYPE_NMI_SOURCE: 750 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry); 751 break; 752 case ACPI_MADT_TYPE_LOCAL_APIC_NMI: 753 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry); 754 break; 755 } 756 } 757 758 /* 759 * Setup per-CPU ACPI IDs. 760 */ 761 static void 762 madt_set_ids(void *dummy) 763 { 764 struct lapic_info *la; 765 struct pcpu *pc; 766 u_int i; 767 768 if (madt == NULL) 769 return; 770 for (i = 0; i <= mp_maxid; i++) { 771 if (CPU_ABSENT(i)) 772 continue; 773 pc = pcpu_find(i); 774 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i)); 775 la = &lapics[pc->pc_apic_id]; 776 if (!la->la_enabled) 777 panic("APIC: CPU with APIC ID %u is not enabled", 778 pc->pc_apic_id); 779 pc->pc_acpi_id = la->la_acpi_id; 780 if (bootverbose) 781 printf("APIC: CPU %u has ACPI ID %u\n", i, 782 la->la_acpi_id); 783 } 784 } 785 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_ANY, madt_set_ids, NULL);
Cache object: e9ef8551ecad4c97b0319a0416fc4c62
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