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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  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/limits.h>
35 #include <sys/malloc.h>
36 #include <sys/smp.h>
37 #include <vm/vm.h>
38 #include <vm/pmap.h>
39
40 #include <x86/apicreg.h>
41 #include <machine/intr_machdep.h>
42 #include <x86/apicvar.h>
43 #include <machine/md_var.h>
44 #include <x86/vmware.h>
45
46 #include <contrib/dev/acpica/include/acpi.h>
47 #include <contrib/dev/acpica/include/aclocal.h>
48 #include <contrib/dev/acpica/include/actables.h>
49
50 #include <dev/acpica/acpivar.h>
51 #include <dev/pci/pcivar.h>
52
53 /* These two arrays are indexed by APIC IDs. */
54 static struct {
55         void *io_apic;
56         UINT32 io_vector;
57 } *ioapics;
58
59 static struct lapic_info {
60         u_int la_enabled;
61         u_int la_acpi_id;
62 } lapics[MAX_APIC_ID + 1];
63
64 int madt_found_sci_override;
65 static ACPI_TABLE_MADT *madt;
66 static vm_paddr_t madt_physaddr;
67 static vm_offset_t madt_length;
68
69 static MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items");
70
71 static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source);
72 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source);
73 static int      madt_find_cpu(u_int acpi_id, u_int *apic_id);
74 static int      madt_find_interrupt(int intr, void **apic, u_int *pin);
75 static void     madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg);
76 static void     madt_parse_interrupt_override(
77                     ACPI_MADT_INTERRUPT_OVERRIDE *intr);
78 static void     madt_parse_ints(ACPI_SUBTABLE_HEADER *entry,
79                     void *arg __unused);
80 static void     madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi);
81 static void     madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi);
82 static int      madt_probe(void);
83 static int      madt_probe_cpus(void);
84 static void     madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry,
85                     void *arg __unused);
86 static void     madt_register(void *dummy);
87 static int      madt_setup_local(void);
88 static int      madt_setup_io(void);
89 static void     madt_walk_table(acpi_subtable_handler *handler, void *arg);
90
91 static struct apic_enumerator madt_enumerator = {
92         "MADT",
93         madt_probe,
94         madt_probe_cpus,
95         madt_setup_local,
96         madt_setup_io
97 };
98
99 /*
100  * Look for an ACPI Multiple APIC Description Table ("APIC")
101  */
102 static int
103 madt_probe(void)
104 {
105
106         madt_physaddr = acpi_find_table(ACPI_SIG_MADT);
107         if (madt_physaddr == 0)
108                 return (ENXIO);
109         return (-50);
110 }
111
112 /*
113  * Run through the MP table enumerating CPUs.
114  */
115 static int
116 madt_probe_cpus(void)
117 {
118
119         madt = acpi_map_table(madt_physaddr, ACPI_SIG_MADT);
120         madt_length = madt->Header.Length;
121         KASSERT(madt != NULL, ("Unable to re-map MADT"));
122         madt_walk_table(madt_probe_cpus_handler, NULL);
123         acpi_unmap_table(madt);
124         madt = NULL;
125         return (0);
126 }
127
128 /*
129  * Initialize the local APIC on the BSP.
130  */
131 static int
132 madt_setup_local(void)
133 {
134         ACPI_TABLE_DMAR *dmartbl;
135         vm_paddr_t dmartbl_physaddr;
136         const char *reason;
137         char *hw_vendor;
138         u_int p[4];
139         int user_x2apic;
140         bool bios_x2apic;
141
142         madt = pmap_mapbios(madt_physaddr, madt_length);
143         if ((cpu_feature2 & CPUID2_X2APIC) != 0) {
144                 reason = NULL;
145
146                 /*
147                  * Automatically detect several configurations where
148                  * x2APIC mode is known to cause troubles.  User can
149                  * override the setting with hw.x2apic_enable tunable.
150                  */
151                 dmartbl_physaddr = acpi_find_table(ACPI_SIG_DMAR);
152                 if (dmartbl_physaddr != 0) {
153                         dmartbl = acpi_map_table(dmartbl_physaddr,
154                             ACPI_SIG_DMAR);
155                         if ((dmartbl->Flags & ACPI_DMAR_X2APIC_OPT_OUT) != 0)
156                                 reason = "by DMAR table";
157                         acpi_unmap_table(dmartbl);
158                 }
159                 if (vm_guest == VM_GUEST_VMWARE) {
160                         vmware_hvcall(VMW_HVCMD_GETVCPU_INFO, p);
161                         if ((p[0] & VMW_VCPUINFO_VCPU_RESERVED) != 0 ||
162                             (p[0] & VMW_VCPUINFO_LEGACY_X2APIC) == 0)
163                                 reason =
164                                     "inside VMWare without intr redirection";
165                 } else if (vm_guest == VM_GUEST_XEN) {
166                         reason = "due to running under XEN";
167                 } else if (vm_guest == VM_GUEST_NO &&
168                     CPUID_TO_FAMILY(cpu_id) == 0x6 &&
169                     CPUID_TO_MODEL(cpu_id) == 0x2a) {
170                         hw_vendor = kern_getenv("smbios.planar.maker");
171                         /*
172                          * It seems that some Lenovo and ASUS
173                          * SandyBridge-based notebook BIOSes have a
174                          * bug which prevents booting AP in x2APIC
175                          * mode.  Since the only way to detect mobile
176                          * CPU is to check northbridge pci id, which
177                          * cannot be done that early, disable x2APIC
178                          * for all Lenovo and ASUS SandyBridge
179                          * machines.
180                          */
181                         if (hw_vendor != NULL) {
182                                 if (!strcmp(hw_vendor, "LENOVO") ||
183                                     !strcmp(hw_vendor,
184                                     "ASUSTeK Computer Inc.")) {
185                                         reason =
186                                     "for a suspected SandyBridge BIOS bug";
187                                 }
188                                 freeenv(hw_vendor);
189                         }
190                 }
191                 bios_x2apic = lapic_is_x2apic();
192                 if (reason != NULL && bios_x2apic) {
193                         if (bootverbose)
194                                 printf("x2APIC should be disabled %s but "
195                                     "already enabled by BIOS; enabling.\n",
196                                      reason);
197                         reason = NULL;
198                 }
199                 if (reason == NULL)
200                         x2apic_mode = 1;
201                 else if (bootverbose)
202                         printf("x2APIC available but disabled %s\n", reason);
203                 user_x2apic = x2apic_mode;
204                 TUNABLE_INT_FETCH("hw.x2apic_enable", &user_x2apic);
205                 if (user_x2apic != x2apic_mode) {
206                         if (bios_x2apic && !user_x2apic)
207                                 printf("x2APIC disabled by tunable and "
208                                     "enabled by BIOS; ignoring tunable.");
209                         else
210                                 x2apic_mode = user_x2apic;
211                 }
212         }
213
214         lapic_init(madt->Address);
215         printf("ACPI APIC Table: <%.*s %.*s>\n",
216             (int)sizeof(madt->Header.OemId), madt->Header.OemId,
217             (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId);
218
219         /*
220          * We ignore 64-bit local APIC override entries.  Should we
221          * perhaps emit a warning here if we find one?
222          */
223         return (0);
224 }
225
226 /*
227  * Enumerate I/O APICs and setup interrupt sources.
228  */
229 static int
230 madt_setup_io(void)
231 {
232         void *ioapic;
233         u_int pin;
234         int i;
235
236         /* Try to initialize ACPI so that we can access the FADT. */
237         i = acpi_Startup();
238         if (ACPI_FAILURE(i)) {
239                 printf("MADT: ACPI Startup failed with %s\n",
240                     AcpiFormatException(i));
241                 printf("Try disabling either ACPI or apic support.\n");
242                 panic("Using MADT but ACPI doesn't work");
243         }
244
245         ioapics = malloc(sizeof(*ioapics) * (MAX_APIC_ID + 1), M_MADT,
246             M_WAITOK | M_ZERO);
247
248         /* First, we run through adding I/O APIC's. */
249         madt_walk_table(madt_parse_apics, NULL);
250
251         /* Second, we run through the table tweaking interrupt sources. */
252         madt_walk_table(madt_parse_ints, NULL);
253
254         /*
255          * If there was not an explicit override entry for the SCI,
256          * force it to use level trigger and active-low polarity.
257          */
258         if (!madt_found_sci_override) {
259                 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic,
260                     &pin) != 0)
261                         printf("MADT: Could not find APIC for SCI IRQ %u\n",
262                             AcpiGbl_FADT.SciInterrupt);
263                 else {
264                         printf(
265         "MADT: Forcing active-low polarity and level trigger for SCI\n");
266                         ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
267                         ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
268                 }
269         }
270
271         /* Third, we register all the I/O APIC's. */
272         for (i = 0; i <= MAX_APIC_ID; i++)
273                 if (ioapics[i].io_apic != NULL)
274                         ioapic_register(ioapics[i].io_apic);
275
276         /* Finally, we throw the switch to enable the I/O APIC's. */
277         acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
278
279         free(ioapics, M_MADT);
280         ioapics = NULL;
281
282         return (0);
283 }
284
285 static void
286 madt_register(void *dummy __unused)
287 {
288
289         apic_register_enumerator(&madt_enumerator);
290 }
291 SYSINIT(madt_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, madt_register, NULL);
292
293 /*
294  * Call the handler routine for each entry in the MADT table.
295  */
296 static void
297 madt_walk_table(acpi_subtable_handler *handler, void *arg)
298 {
299
300         acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
301             handler, arg);
302 }
303
304 static void
305 madt_add_cpu(u_int acpi_id, u_int apic_id, u_int flags)
306 {
307         struct lapic_info *la;
308
309         /*
310          * The MADT does not include a BSP flag, so we have to let the
311          * MP code figure out which CPU is the BSP on its own.
312          */
313         if (bootverbose)
314                 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n",
315                     apic_id, acpi_id, flags & ACPI_MADT_ENABLED ?
316                     "enabled" : "disabled");
317         if (!(flags & ACPI_MADT_ENABLED))
318                 return;
319         if (apic_id > MAX_APIC_ID) {
320                 printf("MADT: Ignoring local APIC ID %u (too high)\n",
321                     apic_id);
322                 return;
323         }
324
325         la = &lapics[apic_id];
326         KASSERT(la->la_enabled == 0, ("Duplicate local APIC ID %u", apic_id));
327         la->la_enabled = 1;
328         la->la_acpi_id = acpi_id;
329         lapic_create(apic_id, 0);
330 }
331
332 static void
333 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
334 {
335         ACPI_MADT_LOCAL_APIC *proc;
336         ACPI_MADT_LOCAL_X2APIC *x2apic;
337
338         switch (entry->Type) {
339         case ACPI_MADT_TYPE_LOCAL_APIC:
340                 proc = (ACPI_MADT_LOCAL_APIC *)entry;
341                 madt_add_cpu(proc->ProcessorId, proc->Id, proc->LapicFlags);
342                 break;
343         case ACPI_MADT_TYPE_LOCAL_X2APIC:
344                 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry;
345                 madt_add_cpu(x2apic->Uid, x2apic->LocalApicId,
346                     x2apic->LapicFlags);
347                 break;
348         }
349 }
350
351
352 /*
353  * Add an I/O APIC from an entry in the table.
354  */
355 static void
356 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
357 {
358         ACPI_MADT_IO_APIC *apic;
359
360         switch (entry->Type) {
361         case ACPI_MADT_TYPE_IO_APIC:
362                 apic = (ACPI_MADT_IO_APIC *)entry;
363                 if (bootverbose)
364                         printf(
365                             "MADT: Found IO APIC ID %u, Interrupt %u at %p\n",
366                             apic->Id, apic->GlobalIrqBase,
367                             (void *)(uintptr_t)apic->Address);
368                 if (apic->Id > MAX_APIC_ID)
369                         panic("%s: I/O APIC ID %u too high", __func__,
370                             apic->Id);
371                 if (ioapics[apic->Id].io_apic != NULL)
372                         panic("%s: Double APIC ID %u", __func__, apic->Id);
373                 if (apic->GlobalIrqBase >= FIRST_MSI_INT) {
374                         printf("MADT: Ignoring bogus I/O APIC ID %u", apic->Id);
375                         break;
376                 }
377                 ioapics[apic->Id].io_apic = ioapic_create(apic->Address,
378                     apic->Id, apic->GlobalIrqBase);
379                 ioapics[apic->Id].io_vector = apic->GlobalIrqBase;
380                 break;
381         default:
382                 break;
383         }
384 }
385
386 /*
387  * Determine properties of an interrupt source.  Note that for ACPI these
388  * functions are only used for ISA interrupts, so we assume ISA bus values
389  * (Active Hi, Edge Triggered) for conforming values except for the ACPI
390  * SCI for which we use Active Lo, Level Triggered.
391  */
392 static enum intr_polarity
393 interrupt_polarity(UINT16 IntiFlags, UINT8 Source)
394 {
395
396         switch (IntiFlags & ACPI_MADT_POLARITY_MASK) {
397         default:
398                 printf("WARNING: Bogus Interrupt Polarity. Assume CONFORMS\n");
399                 /* FALLTHROUGH*/
400         case ACPI_MADT_POLARITY_CONFORMS:
401                 if (Source == AcpiGbl_FADT.SciInterrupt)
402                         return (INTR_POLARITY_LOW);
403                 else
404                         return (INTR_POLARITY_HIGH);
405         case ACPI_MADT_POLARITY_ACTIVE_HIGH:
406                 return (INTR_POLARITY_HIGH);
407         case ACPI_MADT_POLARITY_ACTIVE_LOW:
408                 return (INTR_POLARITY_LOW);
409         }
410 }
411
412 static enum intr_trigger
413 interrupt_trigger(UINT16 IntiFlags, UINT8 Source)
414 {
415
416         switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) {
417         default:
418                 printf("WARNING: Bogus Interrupt Trigger Mode. Assume CONFORMS.\n");
419                 /*FALLTHROUGH*/
420         case ACPI_MADT_TRIGGER_CONFORMS:
421                 if (Source == AcpiGbl_FADT.SciInterrupt)
422                         return (INTR_TRIGGER_LEVEL);
423                 else
424                         return (INTR_TRIGGER_EDGE);
425         case ACPI_MADT_TRIGGER_EDGE:
426                 return (INTR_TRIGGER_EDGE);
427         case ACPI_MADT_TRIGGER_LEVEL:
428                 return (INTR_TRIGGER_LEVEL);
429         }
430 }
431
432 /*
433  * Find the local APIC ID associated with a given ACPI Processor ID.
434  */
435 static int
436 madt_find_cpu(u_int acpi_id, u_int *apic_id)
437 {
438         int i;
439
440         for (i = 0; i <= MAX_APIC_ID; i++) {
441                 if (!lapics[i].la_enabled)
442                         continue;
443                 if (lapics[i].la_acpi_id != acpi_id)
444                         continue;
445                 *apic_id = i;
446                 return (0);
447         }
448         return (ENOENT);
449 }
450
451 /*
452  * Find the IO APIC and pin on that APIC associated with a given global
453  * interrupt.
454  */
455 static int
456 madt_find_interrupt(int intr, void **apic, u_int *pin)
457 {
458         int i, best;
459
460         best = -1;
461         for (i = 0; i <= MAX_APIC_ID; i++) {
462                 if (ioapics[i].io_apic == NULL ||
463                     ioapics[i].io_vector > intr)
464                         continue;
465                 if (best == -1 ||
466                     ioapics[best].io_vector < ioapics[i].io_vector)
467                         best = i;
468         }
469         if (best == -1)
470                 return (ENOENT);
471         *apic = ioapics[best].io_apic;
472         *pin = intr - ioapics[best].io_vector;
473         if (*pin > 32)
474                 printf("WARNING: Found intpin of %u for vector %d\n", *pin,
475                     intr);
476         return (0);
477 }
478
479 void
480 madt_parse_interrupt_values(void *entry,
481     enum intr_trigger *trig, enum intr_polarity *pol)
482 {
483         ACPI_MADT_INTERRUPT_OVERRIDE *intr;
484         char buf[64];
485
486         intr = entry;
487
488         if (bootverbose)
489                 printf("MADT: Interrupt override: source %u, irq %u\n",
490                     intr->SourceIrq, intr->GlobalIrq);
491         KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
492
493         /*
494          * Lookup the appropriate trigger and polarity modes for this
495          * entry.
496          */
497         *trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq);
498         *pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq);
499
500         /*
501          * If the SCI is identity mapped but has edge trigger and
502          * active-hi polarity or the force_sci_lo tunable is set,
503          * force it to use level/lo.
504          */
505         if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) {
506                 madt_found_sci_override = 1;
507                 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
508                         if (tolower(buf[0]) == 'e')
509                                 *trig = INTR_TRIGGER_EDGE;
510                         else if (tolower(buf[0]) == 'l')
511                                 *trig = INTR_TRIGGER_LEVEL;
512                         else
513                                 panic(
514                                 "Invalid trigger %s: must be 'edge' or 'level'",
515                                     buf);
516                         printf("MADT: Forcing SCI to %s trigger\n",
517                             *trig == INTR_TRIGGER_EDGE ? "edge" : "level");
518                 }
519                 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
520                         if (tolower(buf[0]) == 'h')
521                                 *pol = INTR_POLARITY_HIGH;
522                         else if (tolower(buf[0]) == 'l')
523                                 *pol = INTR_POLARITY_LOW;
524                         else
525                                 panic(
526                                 "Invalid polarity %s: must be 'high' or 'low'",
527                                     buf);
528                         printf("MADT: Forcing SCI to active %s polarity\n",
529                             *pol == INTR_POLARITY_HIGH ? "high" : "low");
530                 }
531         }
532 }
533
534 /*
535  * Parse an interrupt source override for an ISA interrupt.
536  */
537 static void
538 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr)
539 {
540         void *new_ioapic, *old_ioapic;
541         u_int new_pin, old_pin;
542         enum intr_trigger trig;
543         enum intr_polarity pol;
544
545         if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 &&
546             intr->GlobalIrq == 2) {
547                 if (bootverbose)
548                         printf("MADT: Skipping timer override\n");
549                 return;
550         }
551
552         if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) {
553                 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n",
554                     intr->GlobalIrq, intr->SourceIrq);
555                 return;
556         }
557
558         madt_parse_interrupt_values(intr, &trig, &pol);
559
560         /* Remap the IRQ if it is mapped to a different interrupt vector. */
561         if (intr->SourceIrq != intr->GlobalIrq) {
562                 /*
563                  * If the SCI is remapped to a non-ISA global interrupt,
564                  * then override the vector we use to setup and allocate
565                  * the interrupt.
566                  */
567                 if (intr->GlobalIrq > 15 &&
568                     intr->SourceIrq == AcpiGbl_FADT.SciInterrupt)
569                         acpi_OverrideInterruptLevel(intr->GlobalIrq);
570                 else
571                         ioapic_remap_vector(new_ioapic, new_pin,
572                             intr->SourceIrq);
573                 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic,
574                     &old_pin) != 0)
575                         printf("MADT: Could not find APIC for source IRQ %u\n",
576                             intr->SourceIrq);
577                 else if (ioapic_get_vector(old_ioapic, old_pin) ==
578                     intr->SourceIrq)
579                         ioapic_disable_pin(old_ioapic, old_pin);
580         }
581
582         /* Program the polarity and trigger mode. */
583         ioapic_set_triggermode(new_ioapic, new_pin, trig);
584         ioapic_set_polarity(new_ioapic, new_pin, pol);
585 }
586
587 /*
588  * Parse an entry for an NMI routed to an IO APIC.
589  */
590 static void
591 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi)
592 {
593         void *ioapic;
594         u_int pin;
595
596         if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) {
597                 printf("MADT: Could not find APIC for vector %u\n",
598                     nmi->GlobalIrq);
599                 return;
600         }
601
602         ioapic_set_nmi(ioapic, pin);
603         if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
604                 ioapic_set_triggermode(ioapic, pin,
605                     interrupt_trigger(nmi->IntiFlags, 0));
606         if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
607                 ioapic_set_polarity(ioapic, pin,
608                     interrupt_polarity(nmi->IntiFlags, 0));
609 }
610
611 /*
612  * Parse an entry for an NMI routed to a local APIC LVT pin.
613  */
614 static void
615 madt_handle_local_nmi(u_int acpi_id, UINT8 Lint, UINT16 IntiFlags)
616 {
617         u_int apic_id, pin;
618
619         if (acpi_id == 0xffffffff)
620                 apic_id = APIC_ID_ALL;
621         else if (madt_find_cpu(acpi_id, &apic_id) != 0) {
622                 if (bootverbose)
623                         printf("MADT: Ignoring local NMI routed to "
624                             "ACPI CPU %u\n", acpi_id);
625                 return;
626         }
627         if (Lint == 0)
628                 pin = APIC_LVT_LINT0;
629         else
630                 pin = APIC_LVT_LINT1;
631         lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
632         if (!(IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
633                 lapic_set_lvt_triggermode(apic_id, pin,
634                     interrupt_trigger(IntiFlags, 0));
635         if (!(IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
636                 lapic_set_lvt_polarity(apic_id, pin,
637                     interrupt_polarity(IntiFlags, 0));
638 }
639
640 static void
641 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi)
642 {
643
644         madt_handle_local_nmi(nmi->ProcessorId == 0xff ? 0xffffffff :
645             nmi->ProcessorId, nmi->Lint, nmi->IntiFlags);
646 }
647
648 static void
649 madt_parse_local_x2apic_nmi(ACPI_MADT_LOCAL_X2APIC_NMI *nmi)
650 {
651
652         madt_handle_local_nmi(nmi->Uid, nmi->Lint, nmi->IntiFlags);
653 }
654
655 /*
656  * Parse interrupt entries.
657  */
658 static void
659 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
660 {
661
662         switch (entry->Type) {
663         case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
664                 madt_parse_interrupt_override(
665                         (ACPI_MADT_INTERRUPT_OVERRIDE *)entry);
666                 break;
667         case ACPI_MADT_TYPE_NMI_SOURCE:
668                 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry);
669                 break;
670         case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
671                 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry);
672                 break;
673         case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
674                 madt_parse_local_x2apic_nmi(
675                     (ACPI_MADT_LOCAL_X2APIC_NMI *)entry);
676                 break;
677         }
678 }
679
680 /*
681  * Setup per-CPU ACPI IDs.
682  */
683 static void
684 madt_set_ids(void *dummy)
685 {
686         struct lapic_info *la;
687         struct pcpu *pc;
688         u_int i;
689
690         if (madt == NULL)
691                 return;
692         CPU_FOREACH(i) {
693                 pc = pcpu_find(i);
694                 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
695                 la = &lapics[pc->pc_apic_id];
696                 if (!la->la_enabled)
697                         panic("APIC: CPU with APIC ID %u is not enabled",
698                             pc->pc_apic_id);
699                 pc->pc_acpi_id = la->la_acpi_id;
700                 if (bootverbose)
701                         printf("APIC: CPU %u has ACPI ID %u\n", i,
702                             la->la_acpi_id);
703         }
704 }
705 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, madt_set_ids, NULL);