madt.c revision 193530
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: head/sys/i386/acpica/madt.c 193530 2009-06-05 18:44:36Z jkim $"); 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/include/acpi.h> 52#include <contrib/dev/acpica/include/accommon.h> 53#include <contrib/dev/acpica/include/actables.h> 54 55#include <dev/acpica/acpivar.h> 56#include <dev/pci/pcivar.h> 57 58typedef void madt_entry_handler(ACPI_SUBTABLE_HEADER *entry, void *arg); 59 60/* These two arrays are indexed by APIC IDs. */ 61struct ioapic_info { 62 void *io_apic; 63 UINT32 io_vector; 64} ioapics[MAX_APIC_ID + 1]; 65 66struct lapic_info { 67 u_int la_enabled:1; 68 u_int la_acpi_id:8; 69} lapics[MAX_APIC_ID + 1]; 70 71static int madt_found_sci_override; 72static ACPI_TABLE_MADT *madt; 73static vm_paddr_t madt_physaddr; 74static vm_offset_t madt_length; 75 76MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items"); 77 78static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source); 79static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source); 80static int madt_find_cpu(u_int acpi_id, u_int *apic_id); 81static int madt_find_interrupt(int intr, void **apic, u_int *pin); 82static void *madt_map(vm_paddr_t pa, int offset, vm_offset_t length); 83static void *madt_map_table(vm_paddr_t pa, int offset, const char *sig); 84static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg); 85static void madt_parse_interrupt_override( 86 ACPI_MADT_INTERRUPT_OVERRIDE *intr); 87static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, 88 void *arg __unused); 89static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi); 90static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi); 91static int madt_probe(void); 92static int madt_probe_cpus(void); 93static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, 94 void *arg __unused); 95static int madt_probe_table(vm_paddr_t address); 96static void madt_register(void *dummy); 97static int madt_setup_local(void); 98static int madt_setup_io(void); 99static void madt_unmap(void *data, vm_offset_t length); 100static void madt_unmap_table(void *table); 101static void madt_walk_table(madt_entry_handler *handler, void *arg); 102 103static struct apic_enumerator madt_enumerator = { 104 "MADT", 105 madt_probe, 106 madt_probe_cpus, 107 madt_setup_local, 108 madt_setup_io 109}; 110 111/* 112 * Code to abuse the crashdump map to map in the tables for the early 113 * probe. We cheat and make the following assumptions about how we 114 * use this KVA: pages 0 and 1 are used to map in the header of each 115 * table found via the RSDT or XSDT and pages 2 to n are used to map 116 * in the RSDT or XSDT. We have to use 2 pages for the table headers 117 * in case a header spans a page boundary. The offset is in pages; 118 * the length is in bytes. 119 */ 120static void * 121madt_map(vm_paddr_t pa, int offset, vm_offset_t length) 122{ 123 vm_offset_t va, off; 124 void *data; 125 126 off = pa & PAGE_MASK; 127 length = roundup(length + off, PAGE_SIZE); 128 pa = pa & PG_FRAME; 129 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 130 (offset * PAGE_SIZE); 131 data = (void *)(va + off); 132 length -= PAGE_SIZE; 133 while (length > 0) { 134 va += PAGE_SIZE; 135 pa += PAGE_SIZE; 136 length -= PAGE_SIZE; 137 pmap_kenter(va, pa); 138 invlpg(va); 139 } 140 return (data); 141} 142 143static void 144madt_unmap(void *data, vm_offset_t length) 145{ 146 vm_offset_t va, off; 147 148 va = (vm_offset_t)data; 149 off = va & PAGE_MASK; 150 length = roundup(length + off, PAGE_SIZE); 151 va &= ~PAGE_MASK; 152 while (length > 0) { 153 pmap_kremove(va); 154 invlpg(va); 155 va += PAGE_SIZE; 156 length -= PAGE_SIZE; 157 } 158} 159 160static void * 161madt_map_table(vm_paddr_t pa, int offset, const char *sig) 162{ 163 ACPI_TABLE_HEADER *header; 164 vm_offset_t length; 165 void *table; 166 167 header = madt_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 168 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) { 169 madt_unmap(header, sizeof(ACPI_TABLE_HEADER)); 170 return (NULL); 171 } 172 length = header->Length; 173 madt_unmap(header, sizeof(ACPI_TABLE_HEADER)); 174 table = madt_map(pa, offset, length); 175 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) { 176 if (bootverbose) 177 printf("MADT: Failed checksum for table %s\n", sig); 178 madt_unmap(table, length); 179 return (NULL); 180 } 181 return (table); 182} 183 184static void 185madt_unmap_table(void *table) 186{ 187 ACPI_TABLE_HEADER *header; 188 189 header = (ACPI_TABLE_HEADER *)table; 190 madt_unmap(table, header->Length); 191} 192 193/* 194 * Look for an ACPI Multiple APIC Description Table ("APIC") 195 */ 196static int 197madt_probe(void) 198{ 199 ACPI_PHYSICAL_ADDRESS rsdp_ptr; 200 ACPI_TABLE_RSDP *rsdp; 201 ACPI_TABLE_RSDT *rsdt; 202 ACPI_TABLE_XSDT *xsdt; 203 int i, count; 204 205 if (resource_disabled("acpi", 0)) 206 return (ENXIO); 207 208 /* 209 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 210 * calls pmap_mapbios() to find the RSDP, we assume that we can use 211 * pmap_mapbios() to map the RSDP. 212 */ 213 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0) 214 return (ENXIO); 215 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP)); 216 if (rsdp == NULL) { 217 if (bootverbose) 218 printf("MADT: Failed to map RSDP\n"); 219 return (ENXIO); 220 } 221 222 /* 223 * For ACPI >= 2.0, use the XSDT if it is available. 224 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 1 225 * in the crashdump area. Page 0 is used to map in the 226 * headers of candidate ACPI tables. 227 */ 228 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) { 229 /* 230 * AcpiOsGetRootPointer only verifies the checksum for 231 * the version 1.0 portion of the RSDP. Version 2.0 has 232 * an additional checksum that we verify first. 233 */ 234 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) { 235 if (bootverbose) 236 printf("MADT: RSDP failed extended checksum\n"); 237 return (ENXIO); 238 } 239 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 2, 240 ACPI_SIG_XSDT); 241 if (xsdt == NULL) { 242 if (bootverbose) 243 printf("MADT: Failed to map XSDT\n"); 244 return (ENXIO); 245 } 246 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 247 sizeof(UINT64); 248 for (i = 0; i < count; i++) 249 if (madt_probe_table(xsdt->TableOffsetEntry[i])) 250 break; 251 madt_unmap_table(xsdt); 252 } else { 253 rsdt = madt_map_table(rsdp->RsdtPhysicalAddress, 2, 254 ACPI_SIG_RSDT); 255 if (rsdt == NULL) { 256 if (bootverbose) 257 printf("MADT: Failed to map RSDT\n"); 258 return (ENXIO); 259 } 260 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) / 261 sizeof(UINT32); 262 for (i = 0; i < count; i++) 263 if (madt_probe_table(rsdt->TableOffsetEntry[i])) 264 break; 265 madt_unmap_table(rsdt); 266 } 267 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP)); 268 if (madt_physaddr == 0) { 269 if (bootverbose) 270 printf("MADT: No MADT table found\n"); 271 return (ENXIO); 272 } 273 if (bootverbose) 274 printf("MADT: Found table at 0x%jx\n", 275 (uintmax_t)madt_physaddr); 276 277 /* 278 * Verify that we can map the full table and that its checksum is 279 * correct, etc. 280 */ 281 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT); 282 if (madt == NULL) 283 return (ENXIO); 284 madt_unmap_table(madt); 285 madt = NULL; 286 287 return (0); 288} 289 290/* 291 * See if a given ACPI table is the MADT. 292 */ 293static int 294madt_probe_table(vm_paddr_t address) 295{ 296 ACPI_TABLE_HEADER *table; 297 298 table = madt_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 299 if (table == NULL) { 300 if (bootverbose) 301 printf("MADT: Failed to map table at 0x%jx\n", 302 (uintmax_t)address); 303 return (0); 304 } 305 if (bootverbose) 306 printf("Table '%.4s' at 0x%jx\n", table->Signature, 307 (uintmax_t)address); 308 309 if (strncmp(table->Signature, ACPI_SIG_MADT, ACPI_NAME_SIZE) != 0) { 310 madt_unmap(table, sizeof(ACPI_TABLE_HEADER)); 311 return (0); 312 } 313 madt_physaddr = address; 314 madt_length = table->Length; 315 madt_unmap(table, sizeof(ACPI_TABLE_HEADER)); 316 return (1); 317} 318 319/* 320 * Run through the MP table enumerating CPUs. 321 */ 322static int 323madt_probe_cpus(void) 324{ 325 326 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT); 327 KASSERT(madt != NULL, ("Unable to re-map MADT")); 328 madt_walk_table(madt_probe_cpus_handler, NULL); 329 madt_unmap_table(madt); 330 madt = NULL; 331 return (0); 332} 333 334/* 335 * Initialize the local APIC on the BSP. 336 */ 337static int 338madt_setup_local(void) 339{ 340 341 madt = pmap_mapbios(madt_physaddr, madt_length); 342 lapic_init(madt->Address); 343 printf("ACPI APIC Table: <%.*s %.*s>\n", 344 (int)sizeof(madt->Header.OemId), madt->Header.OemId, 345 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId); 346 347 /* 348 * We ignore 64-bit local APIC override entries. Should we 349 * perhaps emit a warning here if we find one? 350 */ 351 return (0); 352} 353 354/* 355 * Enumerate I/O APICs and setup interrupt sources. 356 */ 357static int 358madt_setup_io(void) 359{ 360 void *ioapic; 361 u_int pin; 362 int i; 363 364 /* Try to initialize ACPI so that we can access the FADT. */ 365 i = acpi_Startup(); 366 if (ACPI_FAILURE(i)) { 367 printf("MADT: ACPI Startup failed with %s\n", 368 AcpiFormatException(i)); 369 printf("Try disabling either ACPI or apic support.\n"); 370 panic("Using MADT but ACPI doesn't work"); 371 } 372 373 /* First, we run through adding I/O APIC's. */ 374 madt_walk_table(madt_parse_apics, NULL); 375 376 /* Second, we run through the table tweaking interrupt sources. */ 377 madt_walk_table(madt_parse_ints, NULL); 378 379 /* 380 * If there was not an explicit override entry for the SCI, 381 * force it to use level trigger and active-low polarity. 382 */ 383 if (!madt_found_sci_override) { 384 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic, 385 &pin) != 0) 386 printf("MADT: Could not find APIC for SCI IRQ %u\n", 387 AcpiGbl_FADT.SciInterrupt); 388 else { 389 printf( 390 "MADT: Forcing active-low polarity and level trigger for SCI\n"); 391 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW); 392 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL); 393 } 394 } 395 396 /* Third, we register all the I/O APIC's. */ 397 for (i = 0; i <= MAX_APIC_ID; i++) 398 if (ioapics[i].io_apic != NULL) 399 ioapic_register(ioapics[i].io_apic); 400 401 /* Finally, we throw the switch to enable the I/O APIC's. */ 402 acpi_SetDefaultIntrModel(ACPI_INTR_APIC); 403 404 return (0); 405} 406 407static void 408madt_register(void *dummy __unused) 409{ 410 411 apic_register_enumerator(&madt_enumerator); 412} 413SYSINIT(madt_register, SI_SUB_CPU - 1, SI_ORDER_SECOND, madt_register, NULL); 414 415/* 416 * Call the handler routine for each entry in the MADT table. 417 */ 418static void 419madt_walk_table(madt_entry_handler *handler, void *arg) 420{ 421 ACPI_SUBTABLE_HEADER *entry; 422 u_char *p, *end; 423 424 end = (u_char *)(madt) + madt->Header.Length; 425 for (p = (u_char *)(madt + 1); p < end; ) { 426 entry = (ACPI_SUBTABLE_HEADER *)p; 427 handler(entry, arg); 428 p += entry->Length; 429 } 430} 431 432static void 433madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg) 434{ 435 ACPI_MADT_LOCAL_APIC *proc; 436 struct lapic_info *la; 437 438 switch (entry->Type) { 439 case ACPI_MADT_TYPE_LOCAL_APIC: 440 /* 441 * The MADT does not include a BSP flag, so we have to 442 * let the MP code figure out which CPU is the BSP on 443 * its own. 444 */ 445 proc = (ACPI_MADT_LOCAL_APIC *)entry; 446 if (bootverbose) 447 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n", 448 proc->Id, proc->ProcessorId, 449 (proc->LapicFlags & ACPI_MADT_ENABLED) ? 450 "enabled" : "disabled"); 451 if (!(proc->LapicFlags & ACPI_MADT_ENABLED)) 452 break; 453 if (proc->Id > MAX_APIC_ID) 454 panic("%s: CPU ID %u too high", __func__, proc->Id); 455 la = &lapics[proc->Id]; 456 KASSERT(la->la_enabled == 0, 457 ("Duplicate local APIC ID %u", proc->Id)); 458 la->la_enabled = 1; 459 la->la_acpi_id = proc->ProcessorId; 460 lapic_create(proc->Id, 0); 461 break; 462 } 463} 464 465 466/* 467 * Add an I/O APIC from an entry in the table. 468 */ 469static void 470madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 471{ 472 ACPI_MADT_IO_APIC *apic; 473 474 switch (entry->Type) { 475 case ACPI_MADT_TYPE_IO_APIC: 476 apic = (ACPI_MADT_IO_APIC *)entry; 477 if (bootverbose) 478 printf( 479 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n", 480 apic->Id, apic->GlobalIrqBase, 481 (void *)(uintptr_t)apic->Address); 482 if (apic->Id > MAX_APIC_ID) 483 panic("%s: I/O APIC ID %u too high", __func__, 484 apic->Id); 485 if (ioapics[apic->Id].io_apic != NULL) 486 panic("%s: Double APIC ID %u", __func__, apic->Id); 487 if (apic->GlobalIrqBase >= FIRST_MSI_INT) { 488 printf("MADT: Ignoring bogus I/O APIC ID %u", apic->Id); 489 break; 490 } 491 ioapics[apic->Id].io_apic = ioapic_create(apic->Address, 492 apic->Id, apic->GlobalIrqBase); 493 ioapics[apic->Id].io_vector = apic->GlobalIrqBase; 494 break; 495 default: 496 break; 497 } 498} 499 500/* 501 * Determine properties of an interrupt source. Note that for ACPI these 502 * functions are only used for ISA interrupts, so we assume ISA bus values 503 * (Active Hi, Edge Triggered) for conforming values except for the ACPI 504 * SCI for which we use Active Lo, Level Triggered. 505 */ 506static enum intr_polarity 507interrupt_polarity(UINT16 IntiFlags, UINT8 Source) 508{ 509 510 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) { 511 case ACPI_MADT_POLARITY_CONFORMS: 512 if (Source == AcpiGbl_FADT.SciInterrupt) 513 return (INTR_POLARITY_LOW); 514 else 515 return (INTR_POLARITY_HIGH); 516 case ACPI_MADT_POLARITY_ACTIVE_HIGH: 517 return (INTR_POLARITY_HIGH); 518 case ACPI_MADT_POLARITY_ACTIVE_LOW: 519 return (INTR_POLARITY_LOW); 520 default: 521 panic("Bogus Interrupt Polarity"); 522 } 523} 524 525static enum intr_trigger 526interrupt_trigger(UINT16 IntiFlags, UINT8 Source) 527{ 528 529 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) { 530 case ACPI_MADT_TRIGGER_CONFORMS: 531 if (Source == AcpiGbl_FADT.SciInterrupt) 532 return (INTR_TRIGGER_LEVEL); 533 else 534 return (INTR_TRIGGER_EDGE); 535 case ACPI_MADT_TRIGGER_EDGE: 536 return (INTR_TRIGGER_EDGE); 537 case ACPI_MADT_TRIGGER_LEVEL: 538 return (INTR_TRIGGER_LEVEL); 539 default: 540 panic("Bogus Interrupt Trigger Mode"); 541 } 542} 543 544/* 545 * Find the local APIC ID associated with a given ACPI Processor ID. 546 */ 547static int 548madt_find_cpu(u_int acpi_id, u_int *apic_id) 549{ 550 int i; 551 552 for (i = 0; i <= MAX_APIC_ID; i++) { 553 if (!lapics[i].la_enabled) 554 continue; 555 if (lapics[i].la_acpi_id != acpi_id) 556 continue; 557 *apic_id = i; 558 return (0); 559 } 560 return (ENOENT); 561} 562 563/* 564 * Find the IO APIC and pin on that APIC associated with a given global 565 * interrupt. 566 */ 567static int 568madt_find_interrupt(int intr, void **apic, u_int *pin) 569{ 570 int i, best; 571 572 best = -1; 573 for (i = 0; i <= MAX_APIC_ID; i++) { 574 if (ioapics[i].io_apic == NULL || 575 ioapics[i].io_vector > intr) 576 continue; 577 if (best == -1 || 578 ioapics[best].io_vector < ioapics[i].io_vector) 579 best = i; 580 } 581 if (best == -1) 582 return (ENOENT); 583 *apic = ioapics[best].io_apic; 584 *pin = intr - ioapics[best].io_vector; 585 if (*pin > 32) 586 printf("WARNING: Found intpin of %u for vector %d\n", *pin, 587 intr); 588 return (0); 589} 590 591/* 592 * Parse an interrupt source override for an ISA interrupt. 593 */ 594static void 595madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr) 596{ 597 void *new_ioapic, *old_ioapic; 598 u_int new_pin, old_pin; 599 enum intr_trigger trig; 600 enum intr_polarity pol; 601 char buf[64]; 602 603 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 && 604 intr->GlobalIrq == 2) { 605 if (bootverbose) 606 printf("MADT: Skipping timer override\n"); 607 return; 608 } 609 if (bootverbose) 610 printf("MADT: Interrupt override: source %u, irq %u\n", 611 intr->SourceIrq, intr->GlobalIrq); 612 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero")); 613 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) { 614 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n", 615 intr->GlobalIrq, intr->SourceIrq); 616 return; 617 } 618 619 /* 620 * Lookup the appropriate trigger and polarity modes for this 621 * entry. 622 */ 623 trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq); 624 pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq); 625 626 /* 627 * If the SCI is identity mapped but has edge trigger and 628 * active-hi polarity or the force_sci_lo tunable is set, 629 * force it to use level/lo. 630 */ 631 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) { 632 madt_found_sci_override = 1; 633 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) { 634 if (tolower(buf[0]) == 'e') 635 trig = INTR_TRIGGER_EDGE; 636 else if (tolower(buf[0]) == 'l') 637 trig = INTR_TRIGGER_LEVEL; 638 else 639 panic( 640 "Invalid trigger %s: must be 'edge' or 'level'", 641 buf); 642 printf("MADT: Forcing SCI to %s trigger\n", 643 trig == INTR_TRIGGER_EDGE ? "edge" : "level"); 644 } 645 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) { 646 if (tolower(buf[0]) == 'h') 647 pol = INTR_POLARITY_HIGH; 648 else if (tolower(buf[0]) == 'l') 649 pol = INTR_POLARITY_LOW; 650 else 651 panic( 652 "Invalid polarity %s: must be 'high' or 'low'", 653 buf); 654 printf("MADT: Forcing SCI to active %s polarity\n", 655 pol == INTR_POLARITY_HIGH ? "high" : "low"); 656 } 657 } 658 659 /* Remap the IRQ if it is mapped to a different interrupt vector. */ 660 if (intr->SourceIrq != intr->GlobalIrq) { 661 /* 662 * If the SCI is remapped to a non-ISA global interrupt, 663 * then override the vector we use to setup and allocate 664 * the interrupt. 665 */ 666 if (intr->GlobalIrq > 15 && 667 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) 668 acpi_OverrideInterruptLevel(intr->GlobalIrq); 669 else 670 ioapic_remap_vector(new_ioapic, new_pin, 671 intr->SourceIrq); 672 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic, 673 &old_pin) != 0) 674 printf("MADT: Could not find APIC for source IRQ %u\n", 675 intr->SourceIrq); 676 else if (ioapic_get_vector(old_ioapic, old_pin) == 677 intr->SourceIrq) 678 ioapic_disable_pin(old_ioapic, old_pin); 679 } 680 681 /* Program the polarity and trigger mode. */ 682 ioapic_set_triggermode(new_ioapic, new_pin, trig); 683 ioapic_set_polarity(new_ioapic, new_pin, pol); 684} 685 686/* 687 * Parse an entry for an NMI routed to an IO APIC. 688 */ 689static void 690madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi) 691{ 692 void *ioapic; 693 u_int pin; 694 695 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) { 696 printf("MADT: Could not find APIC for vector %u\n", 697 nmi->GlobalIrq); 698 return; 699 } 700 701 ioapic_set_nmi(ioapic, pin); 702 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 703 ioapic_set_triggermode(ioapic, pin, 704 interrupt_trigger(nmi->IntiFlags, 0)); 705 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 706 ioapic_set_polarity(ioapic, pin, 707 interrupt_polarity(nmi->IntiFlags, 0)); 708} 709 710/* 711 * Parse an entry for an NMI routed to a local APIC LVT pin. 712 */ 713static void 714madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi) 715{ 716 u_int apic_id, pin; 717 718 if (nmi->ProcessorId == 0xff) 719 apic_id = APIC_ID_ALL; 720 else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) { 721 if (bootverbose) 722 printf("MADT: Ignoring local NMI routed to " 723 "ACPI CPU %u\n", nmi->ProcessorId); 724 return; 725 } 726 if (nmi->Lint == 0) 727 pin = LVT_LINT0; 728 else 729 pin = LVT_LINT1; 730 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI); 731 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS)) 732 lapic_set_lvt_triggermode(apic_id, pin, 733 interrupt_trigger(nmi->IntiFlags, 0)); 734 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS)) 735 lapic_set_lvt_polarity(apic_id, pin, 736 interrupt_polarity(nmi->IntiFlags, 0)); 737} 738 739/* 740 * Parse interrupt entries. 741 */ 742static void 743madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused) 744{ 745 746 switch (entry->Type) { 747 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: 748 madt_parse_interrupt_override( 749 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry); 750 break; 751 case ACPI_MADT_TYPE_NMI_SOURCE: 752 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry); 753 break; 754 case ACPI_MADT_TYPE_LOCAL_APIC_NMI: 755 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry); 756 break; 757 } 758} 759 760/* 761 * Setup per-CPU ACPI IDs. 762 */ 763static void 764madt_set_ids(void *dummy) 765{ 766 struct lapic_info *la; 767 struct pcpu *pc; 768 u_int i; 769 770 if (madt == NULL) 771 return; 772 for (i = 0; i <= mp_maxid; i++) { 773 if (CPU_ABSENT(i)) 774 continue; 775 pc = pcpu_find(i); 776 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i)); 777 la = &lapics[pc->pc_apic_id]; 778 if (!la->la_enabled) 779 panic("APIC: CPU with APIC ID %u is not enabled", 780 pc->pc_apic_id); 781 pc->pc_acpi_id = la->la_acpi_id; 782 if (bootverbose) 783 printf("APIC: CPU %u has ACPI ID %u\n", i, 784 la->la_acpi_id); 785 } 786} 787SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_ANY, madt_set_ids, NULL); 788