Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/madt.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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(APIC_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 MULTIPLE_APIC_TABLE *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 Polarity, UINT8 Source); 77 static enum intr_trigger interrupt_trigger(UINT16 TriggerMode, 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(APIC_HEADER *entry, void *arg); 83 static void madt_parse_interrupt_override(MADT_INTERRUPT_OVERRIDE *intr); 84 static void madt_parse_ints(APIC_HEADER *entry, void *arg __unused); 85 static void madt_parse_local_nmi(MADT_LOCAL_APIC_NMI *nmi); 86 static void madt_parse_nmi(MADT_NMI_SOURCE *nmi); 87 static int madt_probe(void); 88 static int madt_probe_cpus(void); 89 static void madt_probe_cpus_handler(APIC_HEADER *entry, void *arg __unused); 90 static int madt_probe_table(vm_paddr_t address); 91 static void madt_register(void *dummy); 92 static int madt_setup_local(void); 93 static int madt_setup_io(void); 94 static void madt_unmap(void *data, vm_offset_t length); 95 static void madt_unmap_table(void *table); 96 static void madt_walk_table(madt_entry_handler *handler, void *arg); 97 98 static struct apic_enumerator madt_enumerator = { 99 "MADT", 100 madt_probe, 101 madt_probe_cpus, 102 madt_setup_local, 103 madt_setup_io 104 }; 105 106 /* 107 * Code to abuse the crashdump map to map in the tables for the early 108 * probe. We cheat and make the following assumptions about how we 109 * use this KVA: pages 0 and 1 are used to map in the header of each 110 * table found via the RSDT or XSDT and pages 2 to n are used to map 111 * in the RSDT or XSDT. We have to use 2 pages for the table headers 112 * in case a header spans a page boundary. The offset is in pages; 113 * the length is in bytes. 114 */ 115 static void * 116 madt_map(vm_paddr_t pa, int offset, vm_offset_t length) 117 { 118 vm_offset_t va, off; 119 void *data; 120 121 off = pa & PAGE_MASK; 122 length = roundup(length + off, PAGE_SIZE); 123 pa = pa & PG_FRAME; 124 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) + 125 (offset * PAGE_SIZE); 126 data = (void *)(va + off); 127 length -= PAGE_SIZE; 128 while (length > 0) { 129 va += PAGE_SIZE; 130 pa += PAGE_SIZE; 131 length -= PAGE_SIZE; 132 pmap_kenter(va, pa); 133 invlpg(va); 134 } 135 return (data); 136 } 137 138 static void 139 madt_unmap(void *data, vm_offset_t length) 140 { 141 vm_offset_t va, off; 142 143 va = (vm_offset_t)data; 144 off = va & PAGE_MASK; 145 length = roundup(length + off, PAGE_SIZE); 146 va &= ~PAGE_MASK; 147 while (length > 0) { 148 pmap_kremove(va); 149 invlpg(va); 150 va += PAGE_SIZE; 151 length -= PAGE_SIZE; 152 } 153 } 154 155 static void * 156 madt_map_table(vm_paddr_t pa, int offset, const char *sig) 157 { 158 ACPI_TABLE_HEADER *header; 159 vm_offset_t length; 160 void *table; 161 162 header = madt_map(pa, offset, sizeof(ACPI_TABLE_HEADER)); 163 if (strncmp(header->Signature, sig, 4) != 0) { 164 madt_unmap(header, sizeof(ACPI_TABLE_HEADER)); 165 return (NULL); 166 } 167 length = header->Length; 168 madt_unmap(header, sizeof(ACPI_TABLE_HEADER)); 169 table = madt_map(pa, offset, length); 170 if (ACPI_FAILURE(AcpiTbVerifyTableChecksum(table))) { 171 if (bootverbose) 172 printf("MADT: Failed checksum for table %s\n", sig); 173 madt_unmap(table, length); 174 return (NULL); 175 } 176 return (table); 177 } 178 179 static void 180 madt_unmap_table(void *table) 181 { 182 ACPI_TABLE_HEADER *header; 183 184 header = (ACPI_TABLE_HEADER *)table; 185 madt_unmap(table, header->Length); 186 } 187 188 /* 189 * Look for an ACPI Multiple APIC Description Table ("APIC") 190 */ 191 static int 192 madt_probe(void) 193 { 194 ACPI_POINTER rsdp_ptr; 195 RSDP_DESCRIPTOR *rsdp; 196 RSDT_DESCRIPTOR *rsdt; 197 XSDT_DESCRIPTOR *xsdt; 198 int i, count; 199 200 if (resource_disabled("acpi", 0)) 201 return (ENXIO); 202 203 /* 204 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn 205 * calls pmap_mapbios() to find the RSDP, we assume that we can use 206 * pmap_mapbios() to map the RSDP. 207 */ 208 if (AcpiOsGetRootPointer(ACPI_LOGICAL_ADDRESSING, &rsdp_ptr) != AE_OK) 209 return (ENXIO); 210 #ifdef __i386__ 211 KASSERT(rsdp_ptr.Pointer.Physical < KERNLOAD, ("RSDP too high")); 212 #endif 213 rsdp = pmap_mapbios(rsdp_ptr.Pointer.Physical, sizeof(RSDP_DESCRIPTOR)); 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(rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) { 233 if (bootverbose) 234 printf("MADT: RSDP failed extended checksum\n"); 235 return (ENXIO); 236 } 237 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 2, XSDT_SIG); 238 if (xsdt == NULL) { 239 if (bootverbose) 240 printf("MADT: Failed to map XSDT\n"); 241 return (ENXIO); 242 } 243 count = (xsdt->Length - sizeof(ACPI_TABLE_HEADER)) / 244 sizeof(UINT64); 245 for (i = 0; i < count; i++) 246 if (madt_probe_table(xsdt->TableOffsetEntry[i])) 247 break; 248 madt_unmap_table(xsdt); 249 } else { 250 rsdt = madt_map_table(rsdp->RsdtPhysicalAddress, 2, RSDT_SIG); 251 if (rsdt == NULL) { 252 if (bootverbose) 253 printf("MADT: Failed to map RSDT\n"); 254 return (ENXIO); 255 } 256 count = (rsdt->Length - sizeof(ACPI_TABLE_HEADER)) / 257 sizeof(UINT32); 258 for (i = 0; i < count; i++) 259 if (madt_probe_table(rsdt->TableOffsetEntry[i])) 260 break; 261 madt_unmap_table(rsdt); 262 } 263 pmap_unmapbios((vm_offset_t)rsdp, sizeof(RSDP_DESCRIPTOR)); 264 if (madt_physaddr == 0) { 265 if (bootverbose) 266 printf("MADT: No MADT table found\n"); 267 return (ENXIO); 268 } 269 if (bootverbose) 270 printf("MADT: Found table at 0x%jx\n", 271 (uintmax_t)madt_physaddr); 272 273 /* 274 * Verify that we can map the full table and that its checksum is 275 * correct, etc. 276 */ 277 madt = madt_map_table(madt_physaddr, 0, APIC_SIG); 278 if (madt == NULL) 279 return (ENXIO); 280 madt_unmap_table(madt); 281 madt = NULL; 282 283 return (0); 284 } 285 286 /* 287 * See if a given ACPI table is the MADT. 288 */ 289 static int 290 madt_probe_table(vm_paddr_t address) 291 { 292 ACPI_TABLE_HEADER *table; 293 294 table = madt_map(address, 0, sizeof(ACPI_TABLE_HEADER)); 295 if (table == NULL) { 296 if (bootverbose) 297 printf("MADT: Failed to map table at 0x%jx\n", 298 (uintmax_t)address); 299 return (0); 300 } 301 if (bootverbose) 302 printf("Table '%.4s' at 0x%jx\n", table->Signature, 303 (uintmax_t)address); 304 305 if (strncmp(table->Signature, APIC_SIG, 4) != 0) { 306 madt_unmap(table, sizeof(ACPI_TABLE_HEADER)); 307 return (0); 308 } 309 madt_physaddr = address; 310 madt_length = table->Length; 311 madt_unmap(table, sizeof(ACPI_TABLE_HEADER)); 312 return (1); 313 } 314 315 /* 316 * Run through the MP table enumerating CPUs. 317 */ 318 static int 319 madt_probe_cpus(void) 320 { 321 322 madt = madt_map_table(madt_physaddr, 0, APIC_SIG); 323 KASSERT(madt != NULL, ("Unable to re-map MADT")); 324 madt_walk_table(madt_probe_cpus_handler, NULL); 325 madt_unmap_table(madt); 326 madt = NULL; 327 return (0); 328 } 329 330 /* 331 * Initialize the local APIC on the BSP. 332 */ 333 static int 334 madt_setup_local(void) 335 { 336 337 madt = pmap_mapbios(madt_physaddr, madt_length); 338 lapic_init((uintptr_t)madt->LocalApicAddress); 339 printf("ACPI APIC Table: <%.*s %.*s>\n", 340 (int)sizeof(madt->OemId), madt->OemId, 341 (int)sizeof(madt->OemTableId), madt->OemTableId); 342 343 /* 344 * We ignore 64-bit local APIC override entries. Should we 345 * perhaps emit a warning here if we find one? 346 */ 347 return (0); 348 } 349 350 /* 351 * Enumerate I/O APICs and setup interrupt sources. 352 */ 353 static int 354 madt_setup_io(void) 355 { 356 void *ioapic; 357 u_int pin; 358 int i; 359 360 /* Try to initialize ACPI so that we can access the FADT. */ 361 i = acpi_Startup(); 362 if (ACPI_FAILURE(i)) { 363 printf("MADT: ACPI Startup failed with %s\n", 364 AcpiFormatException(i)); 365 printf("Try disabling either ACPI or apic support.\n"); 366 panic("Using MADT but ACPI doesn't work"); 367 } 368 369 /* First, we run through adding I/O APIC's. */ 370 madt_walk_table(madt_parse_apics, NULL); 371 372 /* Second, we run through the table tweaking interrupt sources. */ 373 madt_walk_table(madt_parse_ints, NULL); 374 375 /* 376 * If there was not an explicit override entry for the SCI, 377 * force it to use level trigger and active-low polarity. 378 */ 379 if (!madt_found_sci_override) { 380 if (madt_find_interrupt(AcpiGbl_FADT->SciInt, &ioapic, &pin) 381 != 0) 382 printf("MADT: Could not find APIC for SCI IRQ %d\n", 383 AcpiGbl_FADT->SciInt); 384 else { 385 printf( 386 "MADT: Forcing active-low polarity and level trigger for SCI\n"); 387 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW); 388 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL); 389 } 390 } 391 392 /* Third, we register all the I/O APIC's. */ 393 for (i = 0; i <= MAX_APIC_ID; i++) 394 if (ioapics[i].io_apic != NULL) 395 ioapic_register(ioapics[i].io_apic); 396 397 /* Finally, we throw the switch to enable the I/O APIC's. */ 398 acpi_SetDefaultIntrModel(ACPI_INTR_APIC); 399 400 return (0); 401 } 402 403 static void 404 madt_register(void *dummy __unused) 405 { 406 407 apic_register_enumerator(&madt_enumerator); 408 } 409 SYSINIT(madt_register, SI_SUB_CPU - 1, SI_ORDER_FIRST, madt_register, NULL) 410 411 /* 412 * Call the handler routine for each entry in the MADT table. 413 */ 414 static void 415 madt_walk_table(madt_entry_handler *handler, void *arg) 416 { 417 APIC_HEADER *entry; 418 u_char *p, *end; 419 420 end = (u_char *)(madt) + madt->Length; 421 for (p = (u_char *)(madt + 1); p < end; ) { 422 entry = (APIC_HEADER *)p; 423 handler(entry, arg); 424 p += entry->Length; 425 } 426 } 427 428 static void 429 madt_probe_cpus_handler(APIC_HEADER *entry, void *arg) 430 { 431 MADT_PROCESSOR_APIC *proc; 432 struct lapic_info *la; 433 434 switch (entry->Type) { 435 case APIC_PROCESSOR: 436 /* 437 * The MADT does not include a BSP flag, so we have to 438 * let the MP code figure out which CPU is the BSP on 439 * its own. 440 */ 441 proc = (MADT_PROCESSOR_APIC *)entry; 442 if (bootverbose) 443 printf("MADT: Found CPU APIC ID %d ACPI ID %d: %s\n", 444 proc->LocalApicId, proc->ProcessorId, 445 proc->ProcessorEnabled ? "enabled" : "disabled"); 446 if (!proc->ProcessorEnabled) 447 break; 448 if (proc->LocalApicId > MAX_APIC_ID) 449 panic("%s: CPU ID %d too high", __func__, 450 proc->LocalApicId); 451 la = &lapics[proc->LocalApicId]; 452 KASSERT(la->la_enabled == 0, 453 ("Duplicate local APIC ID %d", proc->LocalApicId)); 454 la->la_enabled = 1; 455 la->la_acpi_id = proc->ProcessorId; 456 lapic_create(proc->LocalApicId, 0); 457 break; 458 } 459 } 460 461 462 /* 463 * Add an I/O APIC from an entry in the table. 464 */ 465 static void 466 madt_parse_apics(APIC_HEADER *entry, void *arg __unused) 467 { 468 MADT_IO_APIC *apic; 469 470 switch (entry->Type) { 471 case APIC_IO: 472 apic = (MADT_IO_APIC *)entry; 473 if (bootverbose) 474 printf("MADT: Found IO APIC ID %d, Interrupt %d at %p\n", 475 apic->IoApicId, apic->Interrupt, 476 (void *)(uintptr_t)apic->Address); 477 if (apic->IoApicId > MAX_APIC_ID) 478 panic("%s: I/O APIC ID %d too high", __func__, 479 apic->IoApicId); 480 if (ioapics[apic->IoApicId].io_apic != NULL) 481 panic("%s: Double APIC ID %d", __func__, 482 apic->IoApicId); 483 ioapics[apic->IoApicId].io_apic = ioapic_create( 484 (uintptr_t)apic->Address, apic->IoApicId, 485 apic->Interrupt); 486 ioapics[apic->IoApicId].io_vector = apic->Interrupt; 487 break; 488 default: 489 break; 490 } 491 } 492 493 /* 494 * Determine properties of an interrupt source. Note that for ACPI these 495 * functions are only used for ISA interrupts, so we assume ISA bus values 496 * (Active Hi, Edge Triggered) for conforming values except for the ACPI 497 * SCI for which we use Active Lo, Level Triggered. 498 */ 499 static enum intr_polarity 500 interrupt_polarity(UINT16 Polarity, UINT8 Source) 501 { 502 503 switch (Polarity) { 504 case POLARITY_CONFORMS: 505 if (Source == AcpiGbl_FADT->SciInt) 506 return (INTR_POLARITY_LOW); 507 else 508 return (INTR_POLARITY_HIGH); 509 case POLARITY_ACTIVE_HIGH: 510 return (INTR_POLARITY_HIGH); 511 case POLARITY_ACTIVE_LOW: 512 return (INTR_POLARITY_LOW); 513 default: 514 panic("Bogus Interrupt Polarity"); 515 } 516 } 517 518 static enum intr_trigger 519 interrupt_trigger(UINT16 TriggerMode, UINT8 Source) 520 { 521 522 switch (TriggerMode) { 523 case TRIGGER_CONFORMS: 524 if (Source == AcpiGbl_FADT->SciInt) 525 return (INTR_TRIGGER_LEVEL); 526 else 527 return (INTR_TRIGGER_EDGE); 528 case TRIGGER_EDGE: 529 return (INTR_TRIGGER_EDGE); 530 case TRIGGER_LEVEL: 531 return (INTR_TRIGGER_LEVEL); 532 default: 533 panic("Bogus Interrupt Trigger Mode"); 534 } 535 } 536 537 /* 538 * Find the local APIC ID associated with a given ACPI Processor ID. 539 */ 540 static int 541 madt_find_cpu(u_int acpi_id, u_int *apic_id) 542 { 543 int i; 544 545 for (i = 0; i <= MAX_APIC_ID; i++) { 546 if (!lapics[i].la_enabled) 547 continue; 548 if (lapics[i].la_acpi_id != acpi_id) 549 continue; 550 *apic_id = i; 551 return (0); 552 } 553 return (ENOENT); 554 } 555 556 /* 557 * Find the IO APIC and pin on that APIC associated with a given global 558 * interrupt. 559 */ 560 static int 561 madt_find_interrupt(int intr, void **apic, u_int *pin) 562 { 563 int i, best; 564 565 best = -1; 566 for (i = 0; i <= MAX_APIC_ID; i++) { 567 if (ioapics[i].io_apic == NULL || 568 ioapics[i].io_vector > intr) 569 continue; 570 if (best == -1 || 571 ioapics[best].io_vector < ioapics[i].io_vector) 572 best = i; 573 } 574 if (best == -1) 575 return (ENOENT); 576 *apic = ioapics[best].io_apic; 577 *pin = intr - ioapics[best].io_vector; 578 if (*pin > 32) 579 printf("WARNING: Found intpin of %u for vector %d\n", *pin, 580 intr); 581 return (0); 582 } 583 584 /* 585 * Parse an interrupt source override for an ISA interrupt. 586 */ 587 static void 588 madt_parse_interrupt_override(MADT_INTERRUPT_OVERRIDE *intr) 589 { 590 void *new_ioapic, *old_ioapic; 591 u_int new_pin, old_pin; 592 enum intr_trigger trig; 593 enum intr_polarity pol; 594 char buf[64]; 595 596 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->Source == 0 && 597 intr->Interrupt == 2) { 598 if (bootverbose) 599 printf("MADT: Skipping timer override\n"); 600 return; 601 } 602 if (bootverbose) 603 printf("MADT: Interrupt override: source %u, irq %u\n", 604 intr->Source, intr->Interrupt); 605 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero")); 606 if (madt_find_interrupt(intr->Interrupt, &new_ioapic, 607 &new_pin) != 0) { 608 printf("MADT: Could not find APIC for vector %d (IRQ %d)\n", 609 intr->Interrupt, intr->Source); 610 return; 611 } 612 613 /* 614 * Lookup the appropriate trigger and polarity modes for this 615 * entry. 616 */ 617 trig = interrupt_trigger(intr->TriggerMode, intr->Source); 618 pol = interrupt_polarity(intr->Polarity, intr->Source); 619 620 /* 621 * If the SCI is identity mapped but has edge trigger and 622 * active-hi polarity or the force_sci_lo tunable is set, 623 * force it to use level/lo. 624 */ 625 if (intr->Source == AcpiGbl_FADT->SciInt) { 626 madt_found_sci_override = 1; 627 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) { 628 if (tolower(buf[0]) == 'e') 629 trig = INTR_TRIGGER_EDGE; 630 else if (tolower(buf[0]) == 'l') 631 trig = INTR_TRIGGER_LEVEL; 632 else 633 panic( 634 "Invalid trigger %s: must be 'edge' or 'level'", 635 buf); 636 printf("MADT: Forcing SCI to %s trigger\n", 637 trig == INTR_TRIGGER_EDGE ? "edge" : "level"); 638 } 639 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) { 640 if (tolower(buf[0]) == 'h') 641 pol = INTR_POLARITY_HIGH; 642 else if (tolower(buf[0]) == 'l') 643 pol = INTR_POLARITY_LOW; 644 else 645 panic( 646 "Invalid polarity %s: must be 'high' or 'low'", 647 buf); 648 printf("MADT: Forcing SCI to active %s polarity\n", 649 pol == INTR_POLARITY_HIGH ? "high" : "low"); 650 } 651 } 652 653 /* Remap the IRQ if it is mapped to a different interrupt vector. */ 654 if (intr->Source != intr->Interrupt) { 655 /* 656 * If the SCI is remapped to a non-ISA global interrupt, 657 * then override the vector we use to setup and allocate 658 * the interrupt. 659 */ 660 if (intr->Interrupt > 15 && 661 intr->Source == AcpiGbl_FADT->SciInt) 662 acpi_OverrideInterruptLevel(intr->Interrupt); 663 else 664 ioapic_remap_vector(new_ioapic, new_pin, intr->Source); 665 if (madt_find_interrupt(intr->Source, &old_ioapic, 666 &old_pin) != 0) 667 printf("MADT: Could not find APIC for source IRQ %d\n", 668 intr->Source); 669 else if (ioapic_get_vector(old_ioapic, old_pin) == 670 intr->Source) 671 ioapic_disable_pin(old_ioapic, old_pin); 672 } 673 674 /* Program the polarity and trigger mode. */ 675 ioapic_set_triggermode(new_ioapic, new_pin, trig); 676 ioapic_set_polarity(new_ioapic, new_pin, pol); 677 } 678 679 /* 680 * Parse an entry for an NMI routed to an IO APIC. 681 */ 682 static void 683 madt_parse_nmi(MADT_NMI_SOURCE *nmi) 684 { 685 void *ioapic; 686 u_int pin; 687 688 if (madt_find_interrupt(nmi->Interrupt, &ioapic, &pin) != 0) { 689 printf("MADT: Could not find APIC for vector %d\n", 690 nmi->Interrupt); 691 return; 692 } 693 694 ioapic_set_nmi(ioapic, pin); 695 if (nmi->TriggerMode != TRIGGER_CONFORMS) 696 ioapic_set_triggermode(ioapic, pin, 697 interrupt_trigger(nmi->TriggerMode, 0)); 698 if (nmi->Polarity != TRIGGER_CONFORMS) 699 ioapic_set_polarity(ioapic, pin, 700 interrupt_polarity(nmi->Polarity, 0)); 701 } 702 703 /* 704 * Parse an entry for an NMI routed to a local APIC LVT pin. 705 */ 706 static void 707 madt_parse_local_nmi(MADT_LOCAL_APIC_NMI *nmi) 708 { 709 u_int apic_id, pin; 710 711 if (nmi->ProcessorId == 0xff) 712 apic_id = APIC_ID_ALL; 713 else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) { 714 if (bootverbose) 715 printf("MADT: Ignoring local NMI routed to ACPI CPU %u\n", 716 nmi->ProcessorId); 717 return; 718 } 719 if (nmi->Lint == 0) 720 pin = LVT_LINT0; 721 else 722 pin = LVT_LINT1; 723 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI); 724 if (nmi->TriggerMode != TRIGGER_CONFORMS) 725 lapic_set_lvt_triggermode(apic_id, pin, 726 interrupt_trigger(nmi->TriggerMode, 0)); 727 if (nmi->Polarity != POLARITY_CONFORMS) 728 lapic_set_lvt_polarity(apic_id, pin, 729 interrupt_polarity(nmi->Polarity, 0)); 730 } 731 732 /* 733 * Parse interrupt entries. 734 */ 735 static void 736 madt_parse_ints(APIC_HEADER *entry, void *arg __unused) 737 { 738 739 switch (entry->Type) { 740 case APIC_XRUPT_OVERRIDE: 741 madt_parse_interrupt_override( 742 (MADT_INTERRUPT_OVERRIDE *)entry); 743 break; 744 case APIC_NMI: 745 madt_parse_nmi((MADT_NMI_SOURCE *)entry); 746 break; 747 case APIC_LOCAL_NMI: 748 madt_parse_local_nmi((MADT_LOCAL_APIC_NMI *)entry); 749 break; 750 } 751 } 752 753 /* 754 * Setup per-CPU ACPI IDs. 755 */ 756 static void 757 madt_set_ids(void *dummy) 758 { 759 struct lapic_info *la; 760 struct pcpu *pc; 761 u_int i; 762 763 if (madt == NULL) 764 return; 765 for (i = 0; i <= mp_maxid; i++) { 766 if (CPU_ABSENT(i)) 767 continue; 768 pc = pcpu_find(i); 769 KASSERT(pc != NULL, ("no pcpu data for CPU %d", 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_ANY, madt_set_ids, NULL)
Cache object: e748eba462c8fe447a1defabe828412b
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]