sys/platform/pc32/acpica5/madt.c

   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  * $FreeBSD: src/sys/i386/acpica/madt.c,v 1.17 2004/06/10 20:03:46 jhb Exp $
  30  * $DragonFly: src/sys/platform/pc32/acpica5/madt.c,v 1.9 2007/04/30 07:18:55 dillon Exp $
  31  */
  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/globaldata.h>
  39
  40 #include <vm/vm.h>
  41 #include <vm/vm_param.h>
  42 #include <vm/pmap.h>
  43
  44 #include <machine_base/apic/apicreg.h>
  45 #include <machine/frame.h>
  46 /*#include <machine/intr_machdep.h>*/
  47 #include <machine/md_var.h>
  48 #include <machine_base/apic/apicvar.h>
  49 #include <machine/specialreg.h>
  50 #include <machine/smp.h>
  51 #include <machine/globaldata.h>
  52
  53 #include "acpi.h"
  54 #include "actables.h"
  55 #include "acpivar.h"
  56 #include <bus/pci/pcivar.h>
  57
  58 #define NIOAPICS                32      /* Max number of I/O APICs */
  59 #define NLAPICS                 32      /* Max number of local APICs */
  60
  61 typedef void madt_entry_handler(APIC_HEADER *entry, void *arg);
  62
  63 /* These two arrays are indexed by APIC IDs. */
  64 struct ioapic_info {
  65         void *io_apic;
  66         UINT32 io_vector;
  67 } ioapics[NIOAPICS];
  68
  69 struct lapic_info {
  70         u_int la_enabled:1;
  71         u_int la_acpi_id:8;
  72 } lapics[NLAPICS];
  73
  74 static int madt_found_sci_override;
  75 static MULTIPLE_APIC_TABLE *madt;
  76 static vm_paddr_t madt_physaddr;
  77 static vm_offset_t madt_length;
  78
  79 MALLOC_DEFINE(M_MADT, "MADT Table", "ACPI MADT Table Items");
  80
  81 static enum intr_polarity interrupt_polarity(UINT16 Polarity, UINT8 Source);
  82 static enum intr_trigger interrupt_trigger(UINT16 TriggerMode, UINT8 Source);
  83 static int      madt_find_cpu(u_int acpi_id, u_int *apic_id);
  84 static int      madt_find_interrupt(int intr, void **apic, u_int *pin);
  85 static void     *madt_map(vm_paddr_t pa, int offset, vm_offset_t length);
  86 static void     *madt_map_table(vm_paddr_t pa, int offset, const char *sig);
  87 static void     madt_parse_apics(APIC_HEADER *entry, void *arg);
  88 static void     madt_parse_interrupt_override(MADT_INTERRUPT_OVERRIDE *intr);
  89 static void     madt_parse_ints(APIC_HEADER *entry, void *arg __unused);
  90 static void     madt_parse_local_nmi(MADT_LOCAL_APIC_NMI *nmi);
  91 static void     madt_parse_nmi(MADT_NMI_SOURCE *nmi);
  92 static int      madt_probe(void);
  93 static int      madt_probe_cpus(void);
  94 static void     madt_probe_cpus_handler(APIC_HEADER *entry, void *arg __unused);
  95 static int      madt_probe_table(vm_paddr_t address);
  96 static void     madt_register(void *dummy);
  97 static int      madt_setup_local(void);
  98 static int      madt_setup_io(void);
  99 static void     madt_unmap(void *data, vm_offset_t length);
 100 static void     madt_unmap_table(void *table);
 101 static void     madt_walk_table(madt_entry_handler *handler, void *arg);
 102
 103 static 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: page 0 is used to map in the first page of each table
 115  * found via the RSDT or XSDT and pages 1 to n are used to map in the
 116  * RSDT or XSDT.  The offset is in pages; 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                 cpu_invlpg((void *)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                 cpu_invlpg((void *)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, 4) != 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(AcpiTbVerifyTableChecksum(table))) {
 174                 if (bootverbose)
 175                         kprintf("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_POINTER rsdp_ptr;
 198         RSDP_DESCRIPTOR *rsdp;
 199         RSDT_DESCRIPTOR *rsdt;
 200         XSDT_DESCRIPTOR *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_mapdev() to find the RSDP, we assume that we can use
 209          * pmap_mapdev() to map the RSDP.
 210          */
 211         if (AcpiOsGetRootPointer(ACPI_LOGICAL_ADDRESSING, &rsdp_ptr) != AE_OK)
 212                 return (ENXIO);
 213         rsdp = pmap_mapdev(rsdp_ptr.Pointer.Physical, sizeof(RSDP_DESCRIPTOR));
 214         if (rsdp == NULL) {
 215                 if (bootverbose)
 216                         kprintf("MADT: Failed to map RSDP\n");
 217                 return (ENXIO);
 218         }
 219
 220         /*
 221          * For ACPI < 2.0, use the RSDT.  For ACPI >= 2.0, use the XSDT.
 222          * We map the XSDT and RSDT at page 1 in the crashdump area.
 223          * Page 0 is used to map in the headers of candidate ACPI tables.
 224          */
 225         if (rsdp->Revision >= 2) {
 226                 /*
 227                  * AcpiOsGetRootPointer only verifies the checksum for
 228                  * the version 1.0 portion of the RSDP.  Version 2.0 has
 229                  * an additional checksum that we verify first.
 230                  */
 231                 if (AcpiTbChecksum(rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) {
 232                         if (bootverbose)
 233                                 kprintf("MADT: RSDP failed extended checksum\n");
 234                         return (ENXIO);
 235                 }
 236                 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 1, XSDT_SIG);
 237                 if (xsdt == NULL) {
 238                         if (bootverbose)
 239                                 kprintf("MADT: Failed to map XSDT\n");
 240                         return (ENXIO);
 241                 }
 242                 count = (xsdt->Length - sizeof(ACPI_TABLE_HEADER)) /
 243                     sizeof(UINT64);
 244                 for (i = 0; i < count; i++)
 245                         if (madt_probe_table(xsdt->TableOffsetEntry[i]))
 246                                 break;
 247                 madt_unmap_table(xsdt);
 248         } else {
 249                 rsdt = madt_map_table(rsdp->RsdtPhysicalAddress, 1, RSDT_SIG);
 250                 if (rsdt == NULL) {
 251                         if (bootverbose)
 252                                 kprintf("MADT: Failed to map RSDT\n");
 253                         return (ENXIO);
 254                 }
 255                 count = (rsdt->Length - sizeof(ACPI_TABLE_HEADER)) /
 256                     sizeof(UINT32);
 257                 for (i = 0; i < count; i++)
 258                         if (madt_probe_table(rsdt->TableOffsetEntry[i]))
 259                                 break;
 260                 madt_unmap_table(rsdt);
 261         }
 262         pmap_unmapdev((vm_offset_t)rsdp, sizeof(RSDP_DESCRIPTOR));
 263         if (madt_physaddr == 0) {
 264                 if (bootverbose)
 265                         kprintf("MADT: No MADT table found\n");
 266                 return (ENXIO);
 267         }
 268         if (bootverbose)
 269                 kprintf("MADT: Found table at 0x%jx\n",
 270                     (uintmax_t)madt_physaddr);
 271
 272         /*
 273          * Verify that we can map the full table and that its checksum is
 274          * correct, etc.
 275          */
 276         madt = madt_map_table(madt_physaddr, 0, APIC_SIG);
 277         if (madt == NULL)
 278                 return (ENXIO);
 279         madt_unmap_table(madt);
 280         madt = NULL;
 281
 282         return (0);
 283 }
 284
 285 /*
 286  * See if a given ACPI table is the MADT.
 287  */
 288 static int
 289 madt_probe_table(vm_paddr_t address)
 290 {
 291         ACPI_TABLE_HEADER *table;
 292
 293         table = madt_map(address, 0, sizeof(ACPI_TABLE_HEADER));
 294         if (table == NULL) {
 295                 if (bootverbose)
 296                         kprintf("MADT: Failed to map table at 0x%jx\n",
 297                             (uintmax_t)address);
 298                 return (0);
 299         }
 300         if (bootverbose)
 301                 kprintf("Table '%.4s' at 0x%jx\n", table->Signature,
 302                     (uintmax_t)address);
 303
 304         if (strncmp(table->Signature, APIC_SIG, 4) != 0) {
 305                 madt_unmap(table, sizeof(ACPI_TABLE_HEADER));
 306                 return (0);
 307         }
 308         madt_physaddr = address;
 309         madt_length = table->Length;
 310         madt_unmap(table, sizeof(ACPI_TABLE_HEADER));
 311         return (1);
 312 }
 313
 314 /*
 315  * Run through the MP table enumerating CPUs.
 316  */
 317 static int
 318 madt_probe_cpus(void)
 319 {
 320
 321         madt = madt_map_table(madt_physaddr, 0, APIC_SIG);
 322         KASSERT(madt != NULL, ("Unable to re-map MADT"));
 323         madt_walk_table(madt_probe_cpus_handler, NULL);
 324         madt_unmap_table(madt);
 325         madt = NULL;
 326         return (0);
 327 }
 328
 329 /*
 330  * Initialize the local APIC on the BSP.
 331  */
 332 static int
 333 madt_setup_local(void)
 334 {
 335
 336         madt = pmap_mapdev(madt_physaddr, madt_length);
 337         lapic_init((uintptr_t)madt->LocalApicAddress);
 338         kprintf("ACPI APIC Table: <%.*s %.*s>\n",
 339             (int)sizeof(madt->OemId), madt->OemId,
 340             (int)sizeof(madt->OemTableId), madt->OemTableId);
 341
 342         /*
 343          * We ignore 64-bit local APIC override entries.  Should we
 344          * perhaps emit a warning here if we find one?
 345          */
 346         return (0);
 347 }
 348
 349 /*
 350  * Enumerate I/O APICs and setup interrupt sources.
 351  */
 352 static int
 353 madt_setup_io(void)
 354 {
 355         void *ioapic;
 356         u_int pin;
 357         int i;
 358
 359         /* Try to initialize ACPI so that we can access the FADT. */
 360         i = acpi_Startup();
 361         if (ACPI_FAILURE(i)) {
 362                 kprintf("MADT: ACPI Startup failed with %s\n",
 363                     AcpiFormatException(i));
 364                 kprintf("Try disabling either ACPI or apic support.\n");
 365                 panic("Using MADT but ACPI doesn't work");
 366         }
 367
 368         /* First, we run through adding I/O APIC's. */
 369         if (madt->PCATCompat)
 370                 ioapic_enable_mixed_mode();
 371         madt_walk_table(madt_parse_apics, NULL);
 372
 373         /* Second, we run through the table tweaking interrupt sources. */
 374         madt_walk_table(madt_parse_ints, NULL);
 375
 376         /*
 377          * If there was not an explicit override entry for the SCI,
 378          * force it to use level trigger and active-low polarity.
 379          */
 380         if (!madt_found_sci_override) {
 381                 if (madt_find_interrupt(AcpiGbl_FADT->SciInt, &ioapic, &pin)
 382                     != 0)
 383                         kprintf("MADT: Could not find APIC for SCI IRQ %d\n",
 384                             AcpiGbl_FADT->SciInt);
 385                 else {
 386                         kprintf(
 387         "MADT: Forcing active-low polarity and level trigger for SCI\n");
 388                         ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
 389                         ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
 390                 }
 391         }
 392
 393         /* Third, we register all the I/O APIC's. */
 394         for (i = 0; i < NIOAPICS; i++)
 395                 if (ioapics[i].io_apic != NULL)
 396                         ioapic_register(ioapics[i].io_apic);
 397
 398         /* Finally, we throw the switch to enable the I/O APIC's. */
 399         acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
 400
 401         return (0);
 402 }
 403
 404 /*
 405  * Register an enumerator that the SMP startup code might use
 406  */
 407 static void
 408 madt_register(void *dummy __unused)
 409 {
 410         apic_register_enumerator(&madt_enumerator);
 411 }
 412 SYSINIT(madt_register, SI_BOOT2_PRESMP, SI_ORDER_FIRST, madt_register, NULL)
 413
 414 /*
 415  * Call the handler routine for each entry in the MADT table.
 416  */
 417 static void
 418 madt_walk_table(madt_entry_handler *handler, void *arg)
 419 {
 420         APIC_HEADER *entry;
 421         u_char *p, *end;
 422
 423         end = (u_char *)(madt) + madt->Length;
 424         for (p = (u_char *)(madt + 1); p < end; ) {
 425                 entry = (APIC_HEADER *)p;
 426                 handler(entry, arg);
 427                 p += entry->Length;
 428         }
 429 }
 430
 431 static void
 432 madt_probe_cpus_handler(APIC_HEADER *entry, void *arg)
 433 {
 434         MADT_PROCESSOR_APIC *proc;
 435         struct lapic_info *la;
 436
 437         switch (entry->Type) {
 438         case APIC_PROCESSOR:
 439                 /*
 440                  * The MADT does not include a BSP flag, so we have to
 441                  * let the MP code figure out which CPU is the BSP on
 442                  * its own.
 443                  */
 444                 proc = (MADT_PROCESSOR_APIC *)entry;
 445                 if (bootverbose)
 446                         kprintf("MADT: Found CPU APIC ID %d ACPI ID %d: %s\n",
 447                             proc->LocalApicId, proc->ProcessorId,
 448                             proc->ProcessorEnabled ? "enabled" : "disabled");
 449                 if (!proc->ProcessorEnabled)
 450                         break;
 451                 if (proc->LocalApicId >= NLAPICS)
 452                         panic("%s: CPU ID %d too high", __func__,
 453                             proc->LocalApicId);
 454                 la = &lapics[proc->LocalApicId];
 455                 KASSERT(la->la_enabled == 0,
 456                     ("Duplicate local APIC ID %d", proc->LocalApicId));
 457                 la->la_enabled = 1;
 458                 la->la_acpi_id = proc->ProcessorId;
 459                 lapic_create(proc->LocalApicId, 0);
 460                 break;
 461         }
 462 }
 463
 464
 465 /*
 466  * Add an I/O APIC from an entry in the table.
 467  */
 468 static void
 469 madt_parse_apics(APIC_HEADER *entry, void *arg __unused)
 470 {
 471         MADT_IO_APIC *apic;
 472
 473         switch (entry->Type) {
 474         case APIC_IO:
 475                 apic = (MADT_IO_APIC *)entry;
 476                 if (bootverbose)
 477                         kprintf("MADT: Found IO APIC ID %d, Interrupt %d at %p\n",
 478                             apic->IoApicId, apic->Interrupt,
 479                             (void *)(uintptr_t)apic->Address);
 480                 if (apic->IoApicId >= NIOAPICS)
 481                         panic("%s: I/O APIC ID %d too high", __func__,
 482                             apic->IoApicId);
 483                 if (ioapics[apic->IoApicId].io_apic != NULL)
 484                         panic("%s: Double APIC ID %d", __func__,
 485                             apic->IoApicId);
 486                 ioapics[apic->IoApicId].io_apic = ioapic_create(
 487                         (uintptr_t)apic->Address, apic->IoApicId,
 488                             apic->Interrupt);
 489                 ioapics[apic->IoApicId].io_vector = apic->Interrupt;
 490                 break;
 491         default:
 492                 break;
 493         }
 494 }
 495
 496 /*
 497  * Determine properties of an interrupt source.  Note that for ACPI these
 498  * functions are only used for ISA interrupts, so we assume ISA bus values
 499  * (Active Hi, Edge Triggered) for conforming values except for the ACPI
 500  * SCI for which we use Active Lo, Level Triggered.
 501  */
 502 static enum intr_polarity
 503 interrupt_polarity(UINT16 Polarity, UINT8 Source)
 504 {
 505
 506         switch (Polarity) {
 507         case POLARITY_CONFORMS:
 508                 if (Source == AcpiGbl_FADT->SciInt)
 509                         return (INTR_POLARITY_LOW);
 510                 else
 511                         return (INTR_POLARITY_HIGH);
 512         case POLARITY_ACTIVE_HIGH:
 513                 return (INTR_POLARITY_HIGH);
 514         case POLARITY_ACTIVE_LOW:
 515                 return (INTR_POLARITY_LOW);
 516         default:
 517                 panic("Bogus Interrupt Polarity");
 518         }
 519 }
 520
 521 static enum intr_trigger
 522 interrupt_trigger(UINT16 TriggerMode, UINT8 Source)
 523 {
 524
 525         switch (TriggerMode) {
 526         case TRIGGER_CONFORMS:
 527                 if (Source == AcpiGbl_FADT->SciInt)
 528                         return (INTR_TRIGGER_LEVEL);
 529                 else
 530                         return (INTR_TRIGGER_EDGE);
 531         case TRIGGER_EDGE:
 532                 return (INTR_TRIGGER_EDGE);
 533         case TRIGGER_LEVEL:
 534                 return (INTR_TRIGGER_LEVEL);
 535         default:
 536                 panic("Bogus Interrupt Trigger Mode");
 537         }
 538 }
 539
 540 /*
 541  * Find the local APIC ID associated with a given ACPI Processor ID.
 542  */
 543 static int
 544 madt_find_cpu(u_int acpi_id, u_int *apic_id)
 545 {
 546         int i;
 547
 548         for (i = 0; i < NLAPICS; i++) {
 549                 if (!lapics[i].la_enabled)
 550                         continue;
 551                 if (lapics[i].la_acpi_id != acpi_id)
 552                         continue;
 553                 *apic_id = i;
 554                 return (0);
 555         }
 556         return (ENOENT);
 557 }
 558
 559 /*
 560  * Find the IO APIC and pin on that APIC associated with a given global
 561  * interrupt.
 562  */
 563 static int
 564 madt_find_interrupt(int intr, void **apic, u_int *pin)
 565 {
 566         int i, best;
 567
 568         best = -1;
 569         for (i = 0; i < NIOAPICS; i++) {
 570                 if (ioapics[i].io_apic == NULL ||
 571                     ioapics[i].io_vector > intr)
 572                         continue;
 573                 if (best == -1 ||
 574                     ioapics[best].io_vector < ioapics[i].io_vector)
 575                         best = i;
 576         }
 577         if (best == -1)
 578                 return (ENOENT);
 579         *apic = ioapics[best].io_apic;
 580         *pin = intr - ioapics[best].io_vector;
 581         if (*pin > 32)
 582                 kprintf("WARNING: Found intpin of %u for vector %d\n", *pin,
 583                     intr);
 584         return (0);
 585 }
 586
 587 /*
 588  * Parse an interrupt source override for an ISA interrupt.
 589  */
 590 static void
 591 madt_parse_interrupt_override(MADT_INTERRUPT_OVERRIDE *intr)
 592 {
 593         void *new_ioapic, *old_ioapic;
 594         u_int new_pin, old_pin;
 595         enum intr_trigger trig;
 596         enum intr_polarity pol;
 597         char buf[64];
 598
 599         if (bootverbose)
 600                 kprintf("MADT: intr override: source %u, irq %u\n",
 601                     intr->Source, intr->Interrupt);
 602         KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
 603         if (madt_find_interrupt(intr->Interrupt, &new_ioapic,
 604             &new_pin) != 0) {
 605                 kprintf("MADT: Could not find APIC for vector %d (IRQ %d)\n",
 606                     intr->Interrupt, intr->Source);
 607                 return;
 608         }
 609
 610         /*
 611          * Lookup the appropriate trigger and polarity modes for this
 612          * entry.
 613          */
 614         trig = interrupt_trigger(intr->TriggerMode, intr->Source);
 615         pol = interrupt_polarity(intr->Polarity, intr->Source);
 616
 617         /*
 618          * If the SCI is identity mapped but has edge trigger and
 619          * active-hi polarity or the force_sci_lo tunable is set,
 620          * force it to use level/lo.
 621          */
 622         if (intr->Source == AcpiGbl_FADT->SciInt) {
 623                 madt_found_sci_override = 1;
 624                 if (kgetenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
 625                         if (tolower(buf[0]) == 'e')
 626                                 trig = INTR_TRIGGER_EDGE;
 627                         else if (tolower(buf[0]) == 'l')
 628                                 trig = INTR_TRIGGER_LEVEL;
 629                         else
 630                                 panic(
 631                                 "Invalid trigger %s: must be 'edge' or 'level'",
 632                                     buf);
 633                         kprintf("MADT: Forcing SCI to %s trigger\n",
 634                             trig == INTR_TRIGGER_EDGE ? "edge" : "level");
 635                 }
 636                 if (kgetenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
 637                         if (tolower(buf[0]) == 'h')
 638                                 pol = INTR_POLARITY_HIGH;
 639                         else if (tolower(buf[0]) == 'l')
 640                                 pol = INTR_POLARITY_LOW;
 641                         else
 642                                 panic(
 643                                 "Invalid polarity %s: must be 'high' or 'low'",
 644                                     buf);
 645                         kprintf("MADT: Forcing SCI to active %s polarity\n",
 646                             pol == INTR_POLARITY_HIGH ? "high" : "low");
 647                 }
 648         }
 649
 650         /* Remap the IRQ if it is mapped to a different interrupt vector. */
 651         if (intr->Source != intr->Interrupt) {
 652                 /*
 653                  * If the SCI is remapped to a non-ISA global interrupt,
 654                  * then override the vector we use to setup and allocate
 655                  * the interrupt.
 656                  */
 657                 if (intr->Interrupt > 15 &&
 658                     intr->Source == AcpiGbl_FADT->SciInt)
 659                         acpi_OverrideInterruptLevel(intr->Interrupt);
 660                 else
 661                         ioapic_remap_vector(new_ioapic, new_pin, intr->Source);
 662                 if (madt_find_interrupt(intr->Source, &old_ioapic,
 663                     &old_pin) != 0)
 664                         kprintf("MADT: Could not find APIC for source IRQ %d\n",
 665                             intr->Source);
 666                 else if (ioapic_get_vector(old_ioapic, old_pin) ==
 667                     intr->Source)
 668                         ioapic_disable_pin(old_ioapic, old_pin);
 669         }
 670
 671         /* Program the polarity and trigger mode. */
 672         ioapic_set_triggermode(new_ioapic, new_pin, trig);
 673         ioapic_set_polarity(new_ioapic, new_pin, pol);
 674 }
 675
 676 /*
 677  * Parse an entry for an NMI routed to an IO APIC.
 678  */
 679 static void
 680 madt_parse_nmi(MADT_NMI_SOURCE *nmi)
 681 {
 682         void *ioapic;
 683         u_int pin;
 684
 685         if (madt_find_interrupt(nmi->Interrupt, &ioapic, &pin) != 0) {
 686                 kprintf("MADT: Could not find APIC for vector %d\n",
 687                     nmi->Interrupt);
 688                 return;
 689         }
 690
 691         ioapic_set_nmi(ioapic, pin);
 692         if (nmi->TriggerMode != TRIGGER_CONFORMS)
 693                 ioapic_set_triggermode(ioapic, pin,
 694                     interrupt_trigger(nmi->TriggerMode, 0));
 695         if (nmi->Polarity != TRIGGER_CONFORMS)
 696                 ioapic_set_polarity(ioapic, pin,
 697                     interrupt_polarity(nmi->Polarity, 0));
 698 }
 699
 700 /*
 701  * Parse an entry for an NMI routed to a local APIC LVT pin.
 702  */
 703 static void
 704 madt_parse_local_nmi(MADT_LOCAL_APIC_NMI *nmi)
 705 {
 706         u_int apic_id, pin;
 707
 708         if (nmi->ProcessorId == 0xff)
 709                 apic_id = APIC_ID_ALL;
 710         else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) {
 711                 if (bootverbose)
 712                         kprintf("MADT: Ignoring local NMI routed to ACPI CPU %u\n",
 713                             nmi->ProcessorId);
 714                 return;
 715         }
 716         if (nmi->Lint == 0)
 717                 pin = LVT_LINT0;
 718         else
 719                 pin = LVT_LINT1;
 720         lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
 721         if (nmi->TriggerMode != TRIGGER_CONFORMS)
 722                 lapic_set_lvt_triggermode(apic_id, pin,
 723                     interrupt_trigger(nmi->TriggerMode, 0));
 724         if (nmi->Polarity != POLARITY_CONFORMS)
 725                 lapic_set_lvt_polarity(apic_id, pin,
 726                     interrupt_polarity(nmi->Polarity, 0));
 727 }
 728
 729 /*
 730  * Parse interrupt entries.
 731  */
 732 static void
 733 madt_parse_ints(APIC_HEADER *entry, void *arg __unused)
 734 {
 735
 736         switch (entry->Type) {
 737         case APIC_XRUPT_OVERRIDE:
 738                 madt_parse_interrupt_override(
 739                         (MADT_INTERRUPT_OVERRIDE *)entry);
 740                 break;
 741         case APIC_NMI:
 742                 madt_parse_nmi((MADT_NMI_SOURCE *)entry);
 743                 break;
 744         case APIC_LOCAL_NMI:
 745                 madt_parse_local_nmi((MADT_LOCAL_APIC_NMI *)entry);
 746                 break;
 747         }
 748 }
 749
 750 /*
 751  * Setup per-CPU ACPI IDs.  This is done as part of the high-level BIOS
 752  * setup (after SMP), but before MACHDEP systems are initialized.
 753  */
 754 static void
 755 madt_set_ids(void *dummy)
 756 {
 757         struct lapic_info *la;
 758         struct mdglobaldata *md;
 759         u_int i;
 760
 761         if (madt == NULL)
 762                 return;
 763         for (i = 0; i < ncpus; i++) {
 764                 if ((smp_active_mask & (1 << i)) == 0)
 765                         continue;
 766                 md = (struct mdglobaldata *)globaldata_find(i);
 767                 KKASSERT(md != NULL);
 768                 la = &lapics[md->gd_apic_id];
 769                 if (!la->la_enabled)
 770                         panic("APIC: CPU with APIC ID %u is not enabled",
 771                             md->gd_apic_id);
 772                 md->gd_acpi_id = la->la_acpi_id;
 773                 if (bootverbose)
 774                         kprintf("APIC: CPU %u has ACPI ID %u\n", i,
 775                             la->la_acpi_id);
 776         }
 777 }
 778 SYSINIT(madt_set_ids, SI_BOOT2_BIOS, SI_ORDER_FIRST, madt_set_ids, NULL)