1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <sys/limits.h>
34 #include <sys/malloc.h>
35 #include <sys/smp.h>
36 #include <vm/vm.h>
37 #include <vm/pmap.h>
38
39 #include <x86/apicreg.h>
40 #include <machine/intr_machdep.h>
41 #include <x86/apicvar.h>
42 #include <machine/md_var.h>
43 #include <x86/vmware.h>
44
45 #include <contrib/dev/acpica/include/acpi.h>
46 #include <contrib/dev/acpica/include/aclocal.h>
47 #include <contrib/dev/acpica/include/actables.h>
48
49 #include <dev/acpica/acpivar.h>
50 #include <dev/pci/pcivar.h>
51
52 /* These two arrays are indexed by APIC IDs. */
53 static struct {
54 void *io_apic;
55 UINT32 io_vector;
56 } *ioapics;
57
58 static struct lapic_info {
59 u_int la_enabled;
60 u_int la_acpi_id;
61 } *lapics;
62
63 int madt_found_sci_override;
64 static ACPI_TABLE_MADT *madt;
65 static vm_paddr_t madt_physaddr;
66 static vm_offset_t madt_length;
67
68 static MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items");
69
70 static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source);
71 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source);
72 static int madt_find_cpu(u_int acpi_id, u_int *apic_id);
73 static int madt_find_interrupt(int intr, void **apic, u_int *pin);
74 static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg);
75 static void madt_parse_interrupt_override(
76 ACPI_MADT_INTERRUPT_OVERRIDE *intr);
77 static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry,
78 void *arg __unused);
79 static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi);
80 static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi);
81 static int madt_probe(void);
82 static int madt_probe_cpus(void);
83 static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry,
84 void *arg __unused);
85 static void madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER *entry,
86 void *arg __unused);
87 static void madt_register(void *dummy);
88 static int madt_setup_local(void);
89 static int madt_setup_io(void);
90 static void madt_walk_table(acpi_subtable_handler *handler, void *arg);
91
92 static struct apic_enumerator madt_enumerator = {
93 .apic_name = "MADT",
94 .apic_probe = madt_probe,
95 .apic_probe_cpus = madt_probe_cpus,
96 .apic_setup_local = madt_setup_local,
97 .apic_setup_io = madt_setup_io
98 };
99
100 /*
101 * Look for an ACPI Multiple APIC Description Table ("APIC")
102 */
103 static int
madt_probe(void)104 madt_probe(void)
105 {
106
107 madt_physaddr = acpi_find_table(ACPI_SIG_MADT);
108 if (madt_physaddr == 0)
109 return (ENXIO);
110 return (-50);
111 }
112
113 /*
114 * Run through the MP table enumerating CPUs.
115 */
116 static int
madt_probe_cpus(void)117 madt_probe_cpus(void)
118 {
119
120 madt = acpi_map_table(madt_physaddr, ACPI_SIG_MADT);
121 madt_length = madt->Header.Length;
122 KASSERT(madt != NULL, ("Unable to re-map MADT"));
123 madt_walk_table(madt_probe_cpus_handler, NULL);
124 acpi_unmap_table(madt);
125 madt = NULL;
126 return (0);
127 }
128
129 static const char *x2apic_sandy_dis[] = {
130 "LENOVO",
131 "ASUSTeK Computer Inc.",
132 "SAMSUNG ELECTRONICS CO., LTD.",
133 };
134
135 /*
136 * Automatically detect several configurations where x2APIC mode is
137 * known to cause troubles. User can override the setting with
138 * hw.x2apic_enable tunable.
139 */
140 static const char *
madt_x2apic_disable_reason(void)141 madt_x2apic_disable_reason(void)
142 {
143 ACPI_TABLE_DMAR *dmartbl;
144 vm_paddr_t dmartbl_physaddr;
145 const char *reason;
146 char *hw_vendor;
147 u_int p[4];
148 int i;
149
150 reason = NULL;
151
152 dmartbl_physaddr = acpi_find_table(ACPI_SIG_DMAR);
153 if (dmartbl_physaddr != 0) {
154 dmartbl = acpi_map_table(dmartbl_physaddr, ACPI_SIG_DMAR);
155 if ((dmartbl->Flags & ACPI_DMAR_X2APIC_OPT_OUT) != 0)
156 reason = "by DMAR table";
157 acpi_unmap_table(dmartbl);
158 if (reason != NULL)
159 return (reason);
160 }
161
162 if (vm_guest == VM_GUEST_VMWARE) {
163 vmware_hvcall(VMW_HVCMD_GETVCPU_INFO, p);
164 if ((p[0] & VMW_VCPUINFO_VCPU_RESERVED) != 0 ||
165 (p[0] & VMW_VCPUINFO_LEGACY_X2APIC) == 0)
166 return ("inside VMWare without intr redirection");
167 }
168
169 if (vm_guest == VM_GUEST_XEN)
170 return ("due to running under XEN");
171
172 if (vm_guest == VM_GUEST_NO &&
173 CPUID_TO_FAMILY(cpu_id) == 0x6 &&
174 CPUID_TO_MODEL(cpu_id) == 0x2a) {
175 hw_vendor = kern_getenv("smbios.planar.maker");
176 /*
177 * It seems that some SandyBridge-based notebook
178 * BIOSes have a bug which prevents booting AP in
179 * x2APIC mode. Since the only way to detect mobile
180 * CPU is to check northbridge pci id, which cannot be
181 * done that early, disable x2APIC for all such
182 * machines.
183 */
184 if (hw_vendor != NULL) {
185 for (i = 0; i < nitems(x2apic_sandy_dis); i++) {
186 if (strcmp(hw_vendor, x2apic_sandy_dis[i]) ==
187 0) {
188 reason =
189 "for a suspected SandyBridge BIOS bug";
190 break;
191 }
192 }
193 freeenv(hw_vendor);
194 }
195 if (reason != NULL)
196 return (reason);
197 }
198
199 return (NULL);
200 }
201
202 /*
203 * Initialize the local APIC on the BSP.
204 */
205 static int
madt_setup_local(void)206 madt_setup_local(void)
207 {
208 const char *reason;
209 int user_x2apic;
210 bool bios_x2apic;
211
212 if ((cpu_feature2 & CPUID2_X2APIC) != 0) {
213 reason = madt_x2apic_disable_reason();
214 bios_x2apic = lapic_is_x2apic();
215 if (reason != NULL && bios_x2apic) {
216 if (bootverbose)
217 printf("x2APIC should be disabled %s but "
218 "already enabled by BIOS; enabling.\n",
219 reason);
220 reason = NULL;
221 }
222 if (reason == NULL)
223 x2apic_mode = 1;
224 else if (bootverbose)
225 printf("x2APIC available but disabled %s\n", reason);
226 user_x2apic = x2apic_mode;
227 TUNABLE_INT_FETCH("hw.apic.x2apic_mode", &user_x2apic);
228 if (user_x2apic != x2apic_mode) {
229 if (bios_x2apic && !user_x2apic)
230 printf("x2APIC disabled by tunable and "
231 "enabled by BIOS; ignoring tunable.");
232 else
233 x2apic_mode = user_x2apic;
234 }
235 }
236
237 /*
238 * Truncate max_apic_id if not in x2APIC mode. Some structures
239 * will already be allocated with the previous max_apic_id, but
240 * at least we can prevent wasting more memory elsewhere.
241 */
242 if (!x2apic_mode)
243 max_apic_id = min(max_apic_id, xAPIC_MAX_APIC_ID);
244
245 madt = pmap_mapbios(madt_physaddr, madt_length);
246 lapics = malloc(sizeof(*lapics) * (max_apic_id + 1), M_MADT,
247 M_WAITOK | M_ZERO);
248 madt_walk_table(madt_setup_cpus_handler, NULL);
249
250 lapic_init(madt->Address);
251 printf("ACPI APIC Table: <%.*s %.*s>\n",
252 (int)sizeof(madt->Header.OemId), madt->Header.OemId,
253 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId);
254
255 /*
256 * We ignore 64-bit local APIC override entries. Should we
257 * perhaps emit a warning here if we find one?
258 */
259 return (0);
260 }
261
262 /*
263 * Enumerate I/O APICs and setup interrupt sources.
264 */
265 static int
madt_setup_io(void)266 madt_setup_io(void)
267 {
268 void *ioapic;
269 u_int pin;
270 int i;
271
272 KASSERT(lapics != NULL, ("local APICs not initialized"));
273
274 /* Try to initialize ACPI so that we can access the FADT. */
275 i = acpi_Startup();
276 if (ACPI_FAILURE(i)) {
277 printf("MADT: ACPI Startup failed with %s\n",
278 AcpiFormatException(i));
279 printf("Try disabling either ACPI or apic support.\n");
280 panic("Using MADT but ACPI doesn't work");
281 }
282
283 ioapics = malloc(sizeof(*ioapics) * (IOAPIC_MAX_ID + 1), M_MADT,
284 M_WAITOK | M_ZERO);
285
286 /* First, we run through adding I/O APIC's. */
287 madt_walk_table(madt_parse_apics, NULL);
288
289 /* Second, we run through the table tweaking interrupt sources. */
290 madt_walk_table(madt_parse_ints, NULL);
291
292 /*
293 * If there was not an explicit override entry for the SCI,
294 * force it to use level trigger and active-low polarity.
295 */
296 if (!madt_found_sci_override) {
297 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic,
298 &pin) != 0)
299 printf("MADT: Could not find APIC for SCI IRQ %u\n",
300 AcpiGbl_FADT.SciInterrupt);
301 else {
302 printf(
303 "MADT: Forcing active-low polarity and level trigger for SCI\n");
304 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
305 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
306 }
307 }
308
309 /* Third, we register all the I/O APIC's. */
310 for (i = 0; i <= IOAPIC_MAX_ID; i++)
311 if (ioapics[i].io_apic != NULL)
312 ioapic_register(ioapics[i].io_apic);
313
314 /* Finally, we throw the switch to enable the I/O APIC's. */
315 acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
316
317 free(ioapics, M_MADT);
318 ioapics = NULL;
319
320 /* NB: this is the last use of the lapics array. */
321 free(lapics, M_MADT);
322 lapics = NULL;
323
324 return (0);
325 }
326
327 static void
madt_register(void * dummy __unused)328 madt_register(void *dummy __unused)
329 {
330
331 apic_register_enumerator(&madt_enumerator);
332 }
333 SYSINIT(madt_register, SI_SUB_TUNABLES - 1, SI_ORDER_FIRST, madt_register, NULL);
334
335 /*
336 * Call the handler routine for each entry in the MADT table.
337 */
338 static void
madt_walk_table(acpi_subtable_handler * handler,void * arg)339 madt_walk_table(acpi_subtable_handler *handler, void *arg)
340 {
341
342 acpi_walk_subtables(madt + 1, (char *)madt + madt->Header.Length,
343 handler, arg);
344 }
345
346 static void
madt_parse_cpu(unsigned int apic_id,unsigned int flags)347 madt_parse_cpu(unsigned int apic_id, unsigned int flags)
348 {
349
350 if (!(flags & ACPI_MADT_ENABLED) ||
351 #ifdef SMP
352 mp_ncpus == MAXCPU ||
353 #endif
354 apic_id > MAX_APIC_ID)
355 return;
356
357 #ifdef SMP
358 mp_ncpus++;
359 mp_maxid = mp_ncpus - 1;
360 #endif
361 max_apic_id = max(apic_id, max_apic_id);
362 }
363
364 static void
madt_add_cpu(u_int acpi_id,u_int apic_id,u_int flags)365 madt_add_cpu(u_int acpi_id, u_int apic_id, u_int flags)
366 {
367 struct lapic_info *la;
368
369 /*
370 * The MADT does not include a BSP flag, so we have to let the
371 * MP code figure out which CPU is the BSP on its own.
372 */
373 if (bootverbose)
374 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n",
375 apic_id, acpi_id, flags & ACPI_MADT_ENABLED ?
376 "enabled" : "disabled");
377 if (!(flags & ACPI_MADT_ENABLED))
378 return;
379 if (apic_id > max_apic_id) {
380 printf("MADT: Ignoring local APIC ID %u (too high)\n",
381 apic_id);
382 return;
383 }
384
385 la = &lapics[apic_id];
386 KASSERT(la->la_enabled == 0, ("Duplicate local APIC ID %u", apic_id));
387 la->la_enabled = 1;
388 la->la_acpi_id = acpi_id;
389 lapic_create(apic_id, 0);
390 }
391
392 static void
madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER * entry,void * arg)393 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
394 {
395 ACPI_MADT_LOCAL_APIC *proc;
396 ACPI_MADT_LOCAL_X2APIC *x2apic;
397
398 switch (entry->Type) {
399 case ACPI_MADT_TYPE_LOCAL_APIC:
400 proc = (ACPI_MADT_LOCAL_APIC *)entry;
401 madt_parse_cpu(proc->Id, proc->LapicFlags);
402 break;
403 case ACPI_MADT_TYPE_LOCAL_X2APIC:
404 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry;
405 madt_parse_cpu(x2apic->LocalApicId, x2apic->LapicFlags);
406 break;
407 }
408 }
409
410 static void
madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER * entry,void * arg)411 madt_setup_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
412 {
413 ACPI_MADT_LOCAL_APIC *proc;
414 ACPI_MADT_LOCAL_X2APIC *x2apic;
415
416 switch (entry->Type) {
417 case ACPI_MADT_TYPE_LOCAL_APIC:
418 proc = (ACPI_MADT_LOCAL_APIC *)entry;
419 madt_add_cpu(proc->ProcessorId, proc->Id, proc->LapicFlags);
420 break;
421 case ACPI_MADT_TYPE_LOCAL_X2APIC:
422 x2apic = (ACPI_MADT_LOCAL_X2APIC *)entry;
423 madt_add_cpu(x2apic->Uid, x2apic->LocalApicId,
424 x2apic->LapicFlags);
425 break;
426 }
427 }
428
429 /*
430 * Add an I/O APIC from an entry in the table.
431 */
432 static void
madt_parse_apics(ACPI_SUBTABLE_HEADER * entry,void * arg __unused)433 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
434 {
435 ACPI_MADT_IO_APIC *apic;
436
437 switch (entry->Type) {
438 case ACPI_MADT_TYPE_IO_APIC:
439 apic = (ACPI_MADT_IO_APIC *)entry;
440 if (bootverbose)
441 printf(
442 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n",
443 apic->Id, apic->GlobalIrqBase,
444 (void *)(uintptr_t)apic->Address);
445 if (apic->Id > IOAPIC_MAX_ID)
446 panic("%s: I/O APIC ID %u too high", __func__,
447 apic->Id);
448 if (ioapics[apic->Id].io_apic != NULL)
449 panic("%s: Double APIC ID %u", __func__, apic->Id);
450 ioapics[apic->Id].io_apic = ioapic_create(apic->Address,
451 apic->Id, apic->GlobalIrqBase);
452 ioapics[apic->Id].io_vector = apic->GlobalIrqBase;
453 break;
454 default:
455 break;
456 }
457 }
458
459 /*
460 * Determine properties of an interrupt source. Note that for ACPI these
461 * functions are only used for ISA interrupts, so we assume ISA bus values
462 * (Active Hi, Edge Triggered) for conforming values except for the ACPI
463 * SCI for which we use Active Lo, Level Triggered.
464 */
465 static enum intr_polarity
interrupt_polarity(UINT16 IntiFlags,UINT8 Source)466 interrupt_polarity(UINT16 IntiFlags, UINT8 Source)
467 {
468
469 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) {
470 default:
471 printf("WARNING: Bogus Interrupt Polarity. Assume CONFORMS\n");
472 /* FALLTHROUGH*/
473 case ACPI_MADT_POLARITY_CONFORMS:
474 if (Source == AcpiGbl_FADT.SciInterrupt)
475 return (INTR_POLARITY_LOW);
476 else
477 return (INTR_POLARITY_HIGH);
478 case ACPI_MADT_POLARITY_ACTIVE_HIGH:
479 return (INTR_POLARITY_HIGH);
480 case ACPI_MADT_POLARITY_ACTIVE_LOW:
481 return (INTR_POLARITY_LOW);
482 }
483 }
484
485 static enum intr_trigger
interrupt_trigger(UINT16 IntiFlags,UINT8 Source)486 interrupt_trigger(UINT16 IntiFlags, UINT8 Source)
487 {
488
489 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) {
490 default:
491 printf("WARNING: Bogus Interrupt Trigger Mode. Assume CONFORMS.\n");
492 /*FALLTHROUGH*/
493 case ACPI_MADT_TRIGGER_CONFORMS:
494 if (Source == AcpiGbl_FADT.SciInterrupt)
495 return (INTR_TRIGGER_LEVEL);
496 else
497 return (INTR_TRIGGER_EDGE);
498 case ACPI_MADT_TRIGGER_EDGE:
499 return (INTR_TRIGGER_EDGE);
500 case ACPI_MADT_TRIGGER_LEVEL:
501 return (INTR_TRIGGER_LEVEL);
502 }
503 }
504
505 /*
506 * Find the local APIC ID associated with a given ACPI Processor ID.
507 */
508 static int
madt_find_cpu(u_int acpi_id,u_int * apic_id)509 madt_find_cpu(u_int acpi_id, u_int *apic_id)
510 {
511 int i;
512
513 for (i = 0; i <= max_apic_id; i++) {
514 if (!lapics[i].la_enabled)
515 continue;
516 if (lapics[i].la_acpi_id != acpi_id)
517 continue;
518 *apic_id = i;
519 return (0);
520 }
521 return (ENOENT);
522 }
523
524 /*
525 * Find the IO APIC and pin on that APIC associated with a given global
526 * interrupt.
527 */
528 static int
madt_find_interrupt(int intr,void ** apic,u_int * pin)529 madt_find_interrupt(int intr, void **apic, u_int *pin)
530 {
531 int i, best;
532
533 best = -1;
534 for (i = 0; i <= IOAPIC_MAX_ID; i++) {
535 if (ioapics[i].io_apic == NULL ||
536 ioapics[i].io_vector > intr)
537 continue;
538 if (best == -1 ||
539 ioapics[best].io_vector < ioapics[i].io_vector)
540 best = i;
541 }
542 if (best == -1)
543 return (ENOENT);
544 *apic = ioapics[best].io_apic;
545 *pin = intr - ioapics[best].io_vector;
546 if (*pin > 32)
547 printf("WARNING: Found intpin of %u for vector %d\n", *pin,
548 intr);
549 return (0);
550 }
551
552 void
madt_parse_interrupt_values(void * entry,enum intr_trigger * trig,enum intr_polarity * pol)553 madt_parse_interrupt_values(void *entry,
554 enum intr_trigger *trig, enum intr_polarity *pol)
555 {
556 ACPI_MADT_INTERRUPT_OVERRIDE *intr;
557 char buf[64];
558
559 intr = entry;
560
561 if (bootverbose)
562 printf("MADT: Interrupt override: source %u, irq %u\n",
563 intr->SourceIrq, intr->GlobalIrq);
564 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
565
566 /*
567 * Lookup the appropriate trigger and polarity modes for this
568 * entry.
569 */
570 *trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq);
571 *pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq);
572
573 /*
574 * If the SCI is identity mapped but has edge trigger and
575 * active-hi polarity or the force_sci_lo tunable is set,
576 * force it to use level/lo.
577 */
578 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) {
579 madt_found_sci_override = 1;
580 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
581 if (tolower(buf[0]) == 'e')
582 *trig = INTR_TRIGGER_EDGE;
583 else if (tolower(buf[0]) == 'l')
584 *trig = INTR_TRIGGER_LEVEL;
585 else
586 panic(
587 "Invalid trigger %s: must be 'edge' or 'level'",
588 buf);
589 printf("MADT: Forcing SCI to %s trigger\n",
590 *trig == INTR_TRIGGER_EDGE ? "edge" : "level");
591 }
592 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
593 if (tolower(buf[0]) == 'h')
594 *pol = INTR_POLARITY_HIGH;
595 else if (tolower(buf[0]) == 'l')
596 *pol = INTR_POLARITY_LOW;
597 else
598 panic(
599 "Invalid polarity %s: must be 'high' or 'low'",
600 buf);
601 printf("MADT: Forcing SCI to active %s polarity\n",
602 *pol == INTR_POLARITY_HIGH ? "high" : "low");
603 }
604 }
605 }
606
607 /*
608 * Parse an interrupt source override for an ISA interrupt.
609 */
610 static void
madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE * intr)611 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr)
612 {
613 void *new_ioapic, *old_ioapic;
614 u_int new_pin, old_pin;
615 enum intr_trigger trig;
616 enum intr_polarity pol;
617
618 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 &&
619 intr->GlobalIrq == 2) {
620 if (bootverbose)
621 printf("MADT: Skipping timer override\n");
622 return;
623 }
624
625 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) {
626 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n",
627 intr->GlobalIrq, intr->SourceIrq);
628 return;
629 }
630
631 madt_parse_interrupt_values(intr, &trig, &pol);
632
633 /* Remap the IRQ if it is mapped to a different interrupt vector. */
634 if (intr->SourceIrq != intr->GlobalIrq) {
635 /*
636 * If the SCI is remapped to a non-ISA global interrupt,
637 * then override the vector we use to setup and allocate
638 * the interrupt.
639 */
640 if (intr->GlobalIrq > 15 &&
641 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt)
642 acpi_OverrideInterruptLevel(intr->GlobalIrq);
643 else
644 ioapic_remap_vector(new_ioapic, new_pin,
645 intr->SourceIrq);
646 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic,
647 &old_pin) != 0)
648 printf("MADT: Could not find APIC for source IRQ %u\n",
649 intr->SourceIrq);
650 else if (ioapic_get_vector(old_ioapic, old_pin) ==
651 intr->SourceIrq)
652 ioapic_disable_pin(old_ioapic, old_pin);
653 }
654
655 /* Program the polarity and trigger mode. */
656 ioapic_set_triggermode(new_ioapic, new_pin, trig);
657 ioapic_set_polarity(new_ioapic, new_pin, pol);
658 }
659
660 /*
661 * Parse an entry for an NMI routed to an IO APIC.
662 */
663 static void
madt_parse_nmi(ACPI_MADT_NMI_SOURCE * nmi)664 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi)
665 {
666 void *ioapic;
667 u_int pin;
668
669 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) {
670 printf("MADT: Could not find APIC for vector %u\n",
671 nmi->GlobalIrq);
672 return;
673 }
674
675 ioapic_set_nmi(ioapic, pin);
676 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
677 ioapic_set_triggermode(ioapic, pin,
678 interrupt_trigger(nmi->IntiFlags, 0));
679 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
680 ioapic_set_polarity(ioapic, pin,
681 interrupt_polarity(nmi->IntiFlags, 0));
682 }
683
684 /*
685 * Parse an entry for an NMI routed to a local APIC LVT pin.
686 */
687 static void
madt_handle_local_nmi(u_int acpi_id,UINT8 Lint,UINT16 IntiFlags)688 madt_handle_local_nmi(u_int acpi_id, UINT8 Lint, UINT16 IntiFlags)
689 {
690 u_int apic_id, pin;
691
692 if (acpi_id == 0xffffffff)
693 apic_id = APIC_ID_ALL;
694 else if (madt_find_cpu(acpi_id, &apic_id) != 0) {
695 if (bootverbose)
696 printf("MADT: Ignoring local NMI routed to "
697 "ACPI CPU %u\n", acpi_id);
698 return;
699 }
700 if (Lint == 0)
701 pin = APIC_LVT_LINT0;
702 else
703 pin = APIC_LVT_LINT1;
704 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
705 if (!(IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
706 lapic_set_lvt_triggermode(apic_id, pin,
707 interrupt_trigger(IntiFlags, 0));
708 if (!(IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
709 lapic_set_lvt_polarity(apic_id, pin,
710 interrupt_polarity(IntiFlags, 0));
711 }
712
713 static void
madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI * nmi)714 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi)
715 {
716
717 madt_handle_local_nmi(nmi->ProcessorId == 0xff ? 0xffffffff :
718 nmi->ProcessorId, nmi->Lint, nmi->IntiFlags);
719 }
720
721 static void
madt_parse_local_x2apic_nmi(ACPI_MADT_LOCAL_X2APIC_NMI * nmi)722 madt_parse_local_x2apic_nmi(ACPI_MADT_LOCAL_X2APIC_NMI *nmi)
723 {
724
725 madt_handle_local_nmi(nmi->Uid, nmi->Lint, nmi->IntiFlags);
726 }
727
728 /*
729 * Parse interrupt entries.
730 */
731 static void
madt_parse_ints(ACPI_SUBTABLE_HEADER * entry,void * arg __unused)732 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
733 {
734
735 switch (entry->Type) {
736 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
737 madt_parse_interrupt_override(
738 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry);
739 break;
740 case ACPI_MADT_TYPE_NMI_SOURCE:
741 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry);
742 break;
743 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
744 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry);
745 break;
746 case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
747 madt_parse_local_x2apic_nmi(
748 (ACPI_MADT_LOCAL_X2APIC_NMI *)entry);
749 break;
750 }
751 }
752
753 /*
754 * Setup per-CPU ACPI IDs.
755 */
756 static void
madt_set_ids(void * dummy)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
766 KASSERT(lapics != NULL, ("local APICs not initialized"));
767
768 CPU_FOREACH(i) {
769 pc = pcpu_find(i);
770 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
771 la = &lapics[pc->pc_apic_id];
772 if (!la->la_enabled)
773 panic("APIC: CPU with APIC ID %u is not enabled",
774 pc->pc_apic_id);
775 pc->pc_acpi_id = la->la_acpi_id;
776 if (bootverbose)
777 printf("APIC: CPU %u has ACPI ID %u\n", i,
778 la->la_acpi_id);
779 }
780 }
781 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_MIDDLE, madt_set_ids, NULL);
782