FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/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
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(ACPI_SUBTABLE_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 ACPI_TABLE_MADT *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 IntiFlags, UINT8 Source);
77 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, 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(ACPI_SUBTABLE_HEADER *entry, void *arg);
83 static void madt_parse_interrupt_override(
84 ACPI_MADT_INTERRUPT_OVERRIDE *intr);
85 static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry,
86 void *arg __unused);
87 static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi);
88 static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi);
89 static int madt_probe(void);
90 static int madt_probe_cpus(void);
91 static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry,
92 void *arg __unused);
93 static int madt_probe_table(vm_paddr_t address);
94 static void madt_register(void *dummy);
95 static int madt_setup_local(void);
96 static int madt_setup_io(void);
97 static void madt_unmap(void *data, vm_offset_t length);
98 static void madt_unmap_table(void *table);
99 static void madt_walk_table(madt_entry_handler *handler, void *arg);
100
101 static struct apic_enumerator madt_enumerator = {
102 "MADT",
103 madt_probe,
104 madt_probe_cpus,
105 madt_setup_local,
106 madt_setup_io
107 };
108
109 /*
110 * Code to abuse the crashdump map to map in the tables for the early
111 * probe. We cheat and make the following assumptions about how we
112 * use this KVA: page 0 is used to map in the first page of each table
113 * found via the RSDT or XSDT and pages 1 to n are used to map in the
114 * RSDT or XSDT. The offset is in pages; the length is in bytes.
115 */
116 static void *
117 madt_map(vm_paddr_t pa, int offset, vm_offset_t length)
118 {
119 vm_offset_t va, off;
120 void *data;
121
122 off = pa & PAGE_MASK;
123 length = roundup(length + off, PAGE_SIZE);
124 pa = pa & PG_FRAME;
125 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
126 (offset * PAGE_SIZE);
127 data = (void *)(va + off);
128 length -= PAGE_SIZE;
129 while (length > 0) {
130 va += PAGE_SIZE;
131 pa += PAGE_SIZE;
132 length -= PAGE_SIZE;
133 pmap_kenter(va, pa);
134 invlpg(va);
135 }
136 return (data);
137 }
138
139 static void
140 madt_unmap(void *data, vm_offset_t length)
141 {
142 vm_offset_t va, off;
143
144 va = (vm_offset_t)data;
145 off = va & PAGE_MASK;
146 length = roundup(length + off, PAGE_SIZE);
147 va &= ~PAGE_MASK;
148 while (length > 0) {
149 pmap_kremove(va);
150 invlpg(va);
151 va += PAGE_SIZE;
152 length -= PAGE_SIZE;
153 }
154 }
155
156 static void *
157 madt_map_table(vm_paddr_t pa, int offset, const char *sig)
158 {
159 ACPI_TABLE_HEADER *header;
160 vm_offset_t length;
161 void *table;
162
163 header = madt_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
164 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
165 madt_unmap(header, sizeof(ACPI_TABLE_HEADER));
166 return (NULL);
167 }
168 length = header->Length;
169 madt_unmap(header, sizeof(ACPI_TABLE_HEADER));
170 table = madt_map(pa, offset, length);
171 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
172 if (bootverbose)
173 printf("MADT: Failed checksum for table %s\n", sig);
174 madt_unmap(table, length);
175 return (NULL);
176 }
177 return (table);
178 }
179
180 static void
181 madt_unmap_table(void *table)
182 {
183 ACPI_TABLE_HEADER *header;
184
185 header = (ACPI_TABLE_HEADER *)table;
186 madt_unmap(table, header->Length);
187 }
188
189 /*
190 * Look for an ACPI Multiple APIC Description Table ("APIC")
191 */
192 static int
193 madt_probe(void)
194 {
195 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
196 ACPI_TABLE_RSDP *rsdp;
197 ACPI_TABLE_RSDT *rsdt;
198 ACPI_TABLE_XSDT *xsdt;
199 int i, count;
200
201 if (resource_disabled("acpi", 0))
202 return (ENXIO);
203
204 /*
205 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
206 * calls pmap_mapbios() to find the RSDP, we assume that we can use
207 * pmap_mapbios() to map the RSDP.
208 */
209 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
210 return (ENXIO);
211 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
212 if (rsdp == NULL) {
213 if (bootverbose)
214 printf("MADT: Failed to map RSDP\n");
215 return (ENXIO);
216 }
217
218 /*
219 * For ACPI >= 2.0, use the XSDT if it is available.
220 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 1
221 * in the crashdump area. Page 0 is used to map in the
222 * headers of candidate ACPI tables.
223 */
224 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
225 /*
226 * AcpiOsGetRootPointer only verifies the checksum for
227 * the version 1.0 portion of the RSDP. Version 2.0 has
228 * an additional checksum that we verify first.
229 */
230 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
231 if (bootverbose)
232 printf("MADT: RSDP failed extended checksum\n");
233 return (ENXIO);
234 }
235 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 1,
236 ACPI_SIG_XSDT);
237 if (xsdt == NULL) {
238 if (bootverbose)
239 printf("MADT: Failed to map XSDT\n");
240 return (ENXIO);
241 }
242 count = (xsdt->Header.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,
250 ACPI_SIG_RSDT);
251 if (rsdt == NULL) {
252 if (bootverbose)
253 printf("MADT: Failed to map RSDT\n");
254 return (ENXIO);
255 }
256 count = (rsdt->Header.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(ACPI_TABLE_RSDP));
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, ACPI_SIG_MADT);
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, ACPI_SIG_MADT, ACPI_NAME_SIZE) != 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, ACPI_SIG_MADT);
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(madt->Address);
339 printf("ACPI APIC Table: <%.*s %.*s>\n",
340 (int)sizeof(madt->Header.OemId), madt->Header.OemId,
341 (int)sizeof(madt->Header.OemTableId), madt->Header.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.SciInterrupt, &ioapic,
381 &pin) != 0)
382 printf("MADT: Could not find APIC for SCI IRQ %u\n",
383 AcpiGbl_FADT.SciInterrupt);
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_SECOND, 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 ACPI_SUBTABLE_HEADER *entry;
418 u_char *p, *end;
419
420 end = (u_char *)(madt) + madt->Header.Length;
421 for (p = (u_char *)(madt + 1); p < end; ) {
422 entry = (ACPI_SUBTABLE_HEADER *)p;
423 handler(entry, arg);
424 p += entry->Length;
425 }
426 }
427
428 static void
429 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
430 {
431 ACPI_MADT_LOCAL_APIC *proc;
432 struct lapic_info *la;
433
434 switch (entry->Type) {
435 case ACPI_MADT_TYPE_LOCAL_APIC:
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 = (ACPI_MADT_LOCAL_APIC *)entry;
442 if (bootverbose)
443 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n",
444 proc->Id, proc->ProcessorId,
445 (proc->LapicFlags & ACPI_MADT_ENABLED) ?
446 "enabled" : "disabled");
447 if (!(proc->LapicFlags & ACPI_MADT_ENABLED))
448 break;
449 if (proc->Id > MAX_APIC_ID)
450 panic("%s: CPU ID %u too high", __func__, proc->Id);
451 la = &lapics[proc->Id];
452 KASSERT(la->la_enabled == 0,
453 ("Duplicate local APIC ID %u", proc->Id));
454 la->la_enabled = 1;
455 la->la_acpi_id = proc->ProcessorId;
456 lapic_create(proc->Id, 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(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
467 {
468 ACPI_MADT_IO_APIC *apic;
469
470 switch (entry->Type) {
471 case ACPI_MADT_TYPE_IO_APIC:
472 apic = (ACPI_MADT_IO_APIC *)entry;
473 if (bootverbose)
474 printf(
475 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n",
476 apic->Id, apic->GlobalIrqBase,
477 (void *)(uintptr_t)apic->Address);
478 if (apic->Id > MAX_APIC_ID)
479 panic("%s: I/O APIC ID %u too high", __func__,
480 apic->Id);
481 if (ioapics[apic->Id].io_apic != NULL)
482 panic("%s: Double APIC ID %u", __func__, apic->Id);
483 ioapics[apic->Id].io_apic = ioapic_create(apic->Address,
484 apic->Id, apic->GlobalIrqBase);
485 ioapics[apic->Id].io_vector = apic->GlobalIrqBase;
486 break;
487 default:
488 break;
489 }
490 }
491
492 /*
493 * Determine properties of an interrupt source. Note that for ACPI these
494 * functions are only used for ISA interrupts, so we assume ISA bus values
495 * (Active Hi, Edge Triggered) for conforming values except for the ACPI
496 * SCI for which we use Active Lo, Level Triggered.
497 */
498 static enum intr_polarity
499 interrupt_polarity(UINT16 IntiFlags, UINT8 Source)
500 {
501
502 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) {
503 case ACPI_MADT_POLARITY_CONFORMS:
504 if (Source == AcpiGbl_FADT.SciInterrupt)
505 return (INTR_POLARITY_LOW);
506 else
507 return (INTR_POLARITY_HIGH);
508 case ACPI_MADT_POLARITY_ACTIVE_HIGH:
509 return (INTR_POLARITY_HIGH);
510 case ACPI_MADT_POLARITY_ACTIVE_LOW:
511 return (INTR_POLARITY_LOW);
512 default:
513 panic("Bogus Interrupt Polarity");
514 }
515 }
516
517 static enum intr_trigger
518 interrupt_trigger(UINT16 IntiFlags, UINT8 Source)
519 {
520
521 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) {
522 case ACPI_MADT_TRIGGER_CONFORMS:
523 if (Source == AcpiGbl_FADT.SciInterrupt)
524 return (INTR_TRIGGER_LEVEL);
525 else
526 return (INTR_TRIGGER_EDGE);
527 case ACPI_MADT_TRIGGER_EDGE:
528 return (INTR_TRIGGER_EDGE);
529 case ACPI_MADT_TRIGGER_LEVEL:
530 return (INTR_TRIGGER_LEVEL);
531 default:
532 panic("Bogus Interrupt Trigger Mode");
533 }
534 }
535
536 /*
537 * Find the local APIC ID associated with a given ACPI Processor ID.
538 */
539 static int
540 madt_find_cpu(u_int acpi_id, u_int *apic_id)
541 {
542 int i;
543
544 for (i = 0; i <= MAX_APIC_ID; i++) {
545 if (!lapics[i].la_enabled)
546 continue;
547 if (lapics[i].la_acpi_id != acpi_id)
548 continue;
549 *apic_id = i;
550 return (0);
551 }
552 return (ENOENT);
553 }
554
555 /*
556 * Find the IO APIC and pin on that APIC associated with a given global
557 * interrupt.
558 */
559 static int
560 madt_find_interrupt(int intr, void **apic, u_int *pin)
561 {
562 int i, best;
563
564 best = -1;
565 for (i = 0; i <= MAX_APIC_ID; i++) {
566 if (ioapics[i].io_apic == NULL ||
567 ioapics[i].io_vector > intr)
568 continue;
569 if (best == -1 ||
570 ioapics[best].io_vector < ioapics[i].io_vector)
571 best = i;
572 }
573 if (best == -1)
574 return (ENOENT);
575 *apic = ioapics[best].io_apic;
576 *pin = intr - ioapics[best].io_vector;
577 if (*pin > 32)
578 printf("WARNING: Found intpin of %u for vector %d\n", *pin,
579 intr);
580 return (0);
581 }
582
583 /*
584 * Parse an interrupt source override for an ISA interrupt.
585 */
586 static void
587 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr)
588 {
589 void *new_ioapic, *old_ioapic;
590 u_int new_pin, old_pin;
591 enum intr_trigger trig;
592 enum intr_polarity pol;
593 char buf[64];
594
595 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 &&
596 intr->GlobalIrq == 2) {
597 if (bootverbose)
598 printf("MADT: Skipping timer override\n");
599 return;
600 }
601 if (bootverbose)
602 printf("MADT: Interrupt override: source %u, irq %u\n",
603 intr->SourceIrq, intr->GlobalIrq);
604 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
605 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) {
606 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n",
607 intr->GlobalIrq, intr->SourceIrq);
608 return;
609 }
610
611 /*
612 * Lookup the appropriate trigger and polarity modes for this
613 * entry.
614 */
615 trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq);
616 pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq);
617
618 /*
619 * If the SCI is identity mapped but has edge trigger and
620 * active-hi polarity or the force_sci_lo tunable is set,
621 * force it to use level/lo.
622 */
623 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) {
624 madt_found_sci_override = 1;
625 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
626 if (tolower(buf[0]) == 'e')
627 trig = INTR_TRIGGER_EDGE;
628 else if (tolower(buf[0]) == 'l')
629 trig = INTR_TRIGGER_LEVEL;
630 else
631 panic(
632 "Invalid trigger %s: must be 'edge' or 'level'",
633 buf);
634 printf("MADT: Forcing SCI to %s trigger\n",
635 trig == INTR_TRIGGER_EDGE ? "edge" : "level");
636 }
637 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
638 if (tolower(buf[0]) == 'h')
639 pol = INTR_POLARITY_HIGH;
640 else if (tolower(buf[0]) == 'l')
641 pol = INTR_POLARITY_LOW;
642 else
643 panic(
644 "Invalid polarity %s: must be 'high' or 'low'",
645 buf);
646 printf("MADT: Forcing SCI to active %s polarity\n",
647 pol == INTR_POLARITY_HIGH ? "high" : "low");
648 }
649 }
650
651 /* Remap the IRQ if it is mapped to a different interrupt vector. */
652 if (intr->SourceIrq != intr->GlobalIrq) {
653 /*
654 * If the SCI is remapped to a non-ISA global interrupt,
655 * then override the vector we use to setup and allocate
656 * the interrupt.
657 */
658 if (intr->GlobalIrq > 15 &&
659 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt)
660 acpi_OverrideInterruptLevel(intr->GlobalIrq);
661 else
662 ioapic_remap_vector(new_ioapic, new_pin,
663 intr->SourceIrq);
664 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic,
665 &old_pin) != 0)
666 printf("MADT: Could not find APIC for source IRQ %u\n",
667 intr->SourceIrq);
668 else if (ioapic_get_vector(old_ioapic, old_pin) ==
669 intr->SourceIrq)
670 ioapic_disable_pin(old_ioapic, old_pin);
671 }
672
673 /* Program the polarity and trigger mode. */
674 ioapic_set_triggermode(new_ioapic, new_pin, trig);
675 ioapic_set_polarity(new_ioapic, new_pin, pol);
676 }
677
678 /*
679 * Parse an entry for an NMI routed to an IO APIC.
680 */
681 static void
682 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi)
683 {
684 void *ioapic;
685 u_int pin;
686
687 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) {
688 printf("MADT: Could not find APIC for vector %u\n",
689 nmi->GlobalIrq);
690 return;
691 }
692
693 ioapic_set_nmi(ioapic, pin);
694 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
695 ioapic_set_triggermode(ioapic, pin,
696 interrupt_trigger(nmi->IntiFlags, 0));
697 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
698 ioapic_set_polarity(ioapic, pin,
699 interrupt_polarity(nmi->IntiFlags, 0));
700 }
701
702 /*
703 * Parse an entry for an NMI routed to a local APIC LVT pin.
704 */
705 static void
706 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi)
707 {
708 u_int apic_id, pin;
709
710 if (nmi->ProcessorId == 0xff)
711 apic_id = APIC_ID_ALL;
712 else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) {
713 if (bootverbose)
714 printf("MADT: Ignoring local NMI routed to "
715 "ACPI CPU %u\n", nmi->ProcessorId);
716 return;
717 }
718 if (nmi->Lint == 0)
719 pin = LVT_LINT0;
720 else
721 pin = LVT_LINT1;
722 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
723 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
724 lapic_set_lvt_triggermode(apic_id, pin,
725 interrupt_trigger(nmi->IntiFlags, 0));
726 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
727 lapic_set_lvt_polarity(apic_id, pin,
728 interrupt_polarity(nmi->IntiFlags, 0));
729 }
730
731 /*
732 * Parse interrupt entries.
733 */
734 static void
735 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
736 {
737
738 switch (entry->Type) {
739 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
740 madt_parse_interrupt_override(
741 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry);
742 break;
743 case ACPI_MADT_TYPE_NMI_SOURCE:
744 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry);
745 break;
746 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
747 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry);
748 break;
749 }
750 }
751
752 /*
753 * Setup per-CPU ACPI IDs.
754 */
755 static void
756 madt_set_ids(void *dummy)
757 {
758 struct lapic_info *la;
759 struct pcpu *pc;
760 u_int i;
761
762 if (madt == NULL)
763 return;
764 for (i = 0; i <= mp_maxid; i++) {
765 if (CPU_ABSENT(i))
766 continue;
767 pc = pcpu_find(i);
768 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
769 la = &lapics[pc->pc_apic_id];
770 if (!la->la_enabled)
771 panic("APIC: CPU with APIC ID %u is not enabled",
772 pc->pc_apic_id);
773 pc->pc_acpi_id = la->la_acpi_id;
774 if (bootverbose)
775 printf("APIC: CPU %u has ACPI ID %u\n", i,
776 la->la_acpi_id);
777 }
778 }
779 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_ANY, madt_set_ids, NULL)
Cache object: 99b79c1ffb5c44e5c88908f70fa36ccd
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