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: releng/8.0/sys/i386/acpica/madt.c 193530 2009-06-05 18:44:36Z jkim $");
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/include/acpi.h>
52 #include <contrib/dev/acpica/include/accommon.h>
53 #include <contrib/dev/acpica/include/actables.h>
54
55 #include <dev/acpica/acpivar.h>
56 #include <dev/pci/pcivar.h>
57
58 typedef void madt_entry_handler(ACPI_SUBTABLE_HEADER *entry, void *arg);
59
60 /* These two arrays are indexed by APIC IDs. */
61 struct ioapic_info {
62 void *io_apic;
63 UINT32 io_vector;
64 } ioapics[MAX_APIC_ID + 1];
65
66 struct lapic_info {
67 u_int la_enabled:1;
68 u_int la_acpi_id:8;
69 } lapics[MAX_APIC_ID + 1];
70
71 static int madt_found_sci_override;
72 static ACPI_TABLE_MADT *madt;
73 static vm_paddr_t madt_physaddr;
74 static vm_offset_t madt_length;
75
76 MALLOC_DEFINE(M_MADT, "madt_table", "ACPI MADT Table Items");
77
78 static enum intr_polarity interrupt_polarity(UINT16 IntiFlags, UINT8 Source);
79 static enum intr_trigger interrupt_trigger(UINT16 IntiFlags, UINT8 Source);
80 static int madt_find_cpu(u_int acpi_id, u_int *apic_id);
81 static int madt_find_interrupt(int intr, void **apic, u_int *pin);
82 static void *madt_map(vm_paddr_t pa, int offset, vm_offset_t length);
83 static void *madt_map_table(vm_paddr_t pa, int offset, const char *sig);
84 static void madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg);
85 static void madt_parse_interrupt_override(
86 ACPI_MADT_INTERRUPT_OVERRIDE *intr);
87 static void madt_parse_ints(ACPI_SUBTABLE_HEADER *entry,
88 void *arg __unused);
89 static void madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi);
90 static void madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi);
91 static int madt_probe(void);
92 static int madt_probe_cpus(void);
93 static void madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry,
94 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: pages 0 and 1 are used to map in the header of each
115 * table found via the RSDT or XSDT and pages 2 to n are used to map
116 * in the RSDT or XSDT. We have to use 2 pages for the table headers
117 * in case a header spans a page boundary. The offset is in pages;
118 * the length is in bytes.
119 */
120 static void *
121 madt_map(vm_paddr_t pa, int offset, vm_offset_t length)
122 {
123 vm_offset_t va, off;
124 void *data;
125
126 off = pa & PAGE_MASK;
127 length = roundup(length + off, PAGE_SIZE);
128 pa = pa & PG_FRAME;
129 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
130 (offset * PAGE_SIZE);
131 data = (void *)(va + off);
132 length -= PAGE_SIZE;
133 while (length > 0) {
134 va += PAGE_SIZE;
135 pa += PAGE_SIZE;
136 length -= PAGE_SIZE;
137 pmap_kenter(va, pa);
138 invlpg(va);
139 }
140 return (data);
141 }
142
143 static void
144 madt_unmap(void *data, vm_offset_t length)
145 {
146 vm_offset_t va, off;
147
148 va = (vm_offset_t)data;
149 off = va & PAGE_MASK;
150 length = roundup(length + off, PAGE_SIZE);
151 va &= ~PAGE_MASK;
152 while (length > 0) {
153 pmap_kremove(va);
154 invlpg(va);
155 va += PAGE_SIZE;
156 length -= PAGE_SIZE;
157 }
158 }
159
160 static void *
161 madt_map_table(vm_paddr_t pa, int offset, const char *sig)
162 {
163 ACPI_TABLE_HEADER *header;
164 vm_offset_t length;
165 void *table;
166
167 header = madt_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
168 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
169 madt_unmap(header, sizeof(ACPI_TABLE_HEADER));
170 return (NULL);
171 }
172 length = header->Length;
173 madt_unmap(header, sizeof(ACPI_TABLE_HEADER));
174 table = madt_map(pa, offset, length);
175 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
176 if (bootverbose)
177 printf("MADT: Failed checksum for table %s\n", sig);
178 madt_unmap(table, length);
179 return (NULL);
180 }
181 return (table);
182 }
183
184 static void
185 madt_unmap_table(void *table)
186 {
187 ACPI_TABLE_HEADER *header;
188
189 header = (ACPI_TABLE_HEADER *)table;
190 madt_unmap(table, header->Length);
191 }
192
193 /*
194 * Look for an ACPI Multiple APIC Description Table ("APIC")
195 */
196 static int
197 madt_probe(void)
198 {
199 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
200 ACPI_TABLE_RSDP *rsdp;
201 ACPI_TABLE_RSDT *rsdt;
202 ACPI_TABLE_XSDT *xsdt;
203 int i, count;
204
205 if (resource_disabled("acpi", 0))
206 return (ENXIO);
207
208 /*
209 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
210 * calls pmap_mapbios() to find the RSDP, we assume that we can use
211 * pmap_mapbios() to map the RSDP.
212 */
213 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
214 return (ENXIO);
215 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
216 if (rsdp == NULL) {
217 if (bootverbose)
218 printf("MADT: Failed to map RSDP\n");
219 return (ENXIO);
220 }
221
222 /*
223 * For ACPI >= 2.0, use the XSDT if it is available.
224 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 1
225 * in the crashdump area. Page 0 is used to map in the
226 * headers of candidate ACPI tables.
227 */
228 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
229 /*
230 * AcpiOsGetRootPointer only verifies the checksum for
231 * the version 1.0 portion of the RSDP. Version 2.0 has
232 * an additional checksum that we verify first.
233 */
234 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
235 if (bootverbose)
236 printf("MADT: RSDP failed extended checksum\n");
237 return (ENXIO);
238 }
239 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 2,
240 ACPI_SIG_XSDT);
241 if (xsdt == NULL) {
242 if (bootverbose)
243 printf("MADT: Failed to map XSDT\n");
244 return (ENXIO);
245 }
246 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
247 sizeof(UINT64);
248 for (i = 0; i < count; i++)
249 if (madt_probe_table(xsdt->TableOffsetEntry[i]))
250 break;
251 madt_unmap_table(xsdt);
252 } else {
253 rsdt = madt_map_table(rsdp->RsdtPhysicalAddress, 2,
254 ACPI_SIG_RSDT);
255 if (rsdt == NULL) {
256 if (bootverbose)
257 printf("MADT: Failed to map RSDT\n");
258 return (ENXIO);
259 }
260 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
261 sizeof(UINT32);
262 for (i = 0; i < count; i++)
263 if (madt_probe_table(rsdt->TableOffsetEntry[i]))
264 break;
265 madt_unmap_table(rsdt);
266 }
267 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
268 if (madt_physaddr == 0) {
269 if (bootverbose)
270 printf("MADT: No MADT table found\n");
271 return (ENXIO);
272 }
273 if (bootverbose)
274 printf("MADT: Found table at 0x%jx\n",
275 (uintmax_t)madt_physaddr);
276
277 /*
278 * Verify that we can map the full table and that its checksum is
279 * correct, etc.
280 */
281 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT);
282 if (madt == NULL)
283 return (ENXIO);
284 madt_unmap_table(madt);
285 madt = NULL;
286
287 return (0);
288 }
289
290 /*
291 * See if a given ACPI table is the MADT.
292 */
293 static int
294 madt_probe_table(vm_paddr_t address)
295 {
296 ACPI_TABLE_HEADER *table;
297
298 table = madt_map(address, 0, sizeof(ACPI_TABLE_HEADER));
299 if (table == NULL) {
300 if (bootverbose)
301 printf("MADT: Failed to map table at 0x%jx\n",
302 (uintmax_t)address);
303 return (0);
304 }
305 if (bootverbose)
306 printf("Table '%.4s' at 0x%jx\n", table->Signature,
307 (uintmax_t)address);
308
309 if (strncmp(table->Signature, ACPI_SIG_MADT, ACPI_NAME_SIZE) != 0) {
310 madt_unmap(table, sizeof(ACPI_TABLE_HEADER));
311 return (0);
312 }
313 madt_physaddr = address;
314 madt_length = table->Length;
315 madt_unmap(table, sizeof(ACPI_TABLE_HEADER));
316 return (1);
317 }
318
319 /*
320 * Run through the MP table enumerating CPUs.
321 */
322 static int
323 madt_probe_cpus(void)
324 {
325
326 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT);
327 KASSERT(madt != NULL, ("Unable to re-map MADT"));
328 madt_walk_table(madt_probe_cpus_handler, NULL);
329 madt_unmap_table(madt);
330 madt = NULL;
331 return (0);
332 }
333
334 /*
335 * Initialize the local APIC on the BSP.
336 */
337 static int
338 madt_setup_local(void)
339 {
340
341 madt = pmap_mapbios(madt_physaddr, madt_length);
342 lapic_init(madt->Address);
343 printf("ACPI APIC Table: <%.*s %.*s>\n",
344 (int)sizeof(madt->Header.OemId), madt->Header.OemId,
345 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId);
346
347 /*
348 * We ignore 64-bit local APIC override entries. Should we
349 * perhaps emit a warning here if we find one?
350 */
351 return (0);
352 }
353
354 /*
355 * Enumerate I/O APICs and setup interrupt sources.
356 */
357 static int
358 madt_setup_io(void)
359 {
360 void *ioapic;
361 u_int pin;
362 int i;
363
364 /* Try to initialize ACPI so that we can access the FADT. */
365 i = acpi_Startup();
366 if (ACPI_FAILURE(i)) {
367 printf("MADT: ACPI Startup failed with %s\n",
368 AcpiFormatException(i));
369 printf("Try disabling either ACPI or apic support.\n");
370 panic("Using MADT but ACPI doesn't work");
371 }
372
373 /* First, we run through adding I/O APIC's. */
374 madt_walk_table(madt_parse_apics, NULL);
375
376 /* Second, we run through the table tweaking interrupt sources. */
377 madt_walk_table(madt_parse_ints, NULL);
378
379 /*
380 * If there was not an explicit override entry for the SCI,
381 * force it to use level trigger and active-low polarity.
382 */
383 if (!madt_found_sci_override) {
384 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic,
385 &pin) != 0)
386 printf("MADT: Could not find APIC for SCI IRQ %u\n",
387 AcpiGbl_FADT.SciInterrupt);
388 else {
389 printf(
390 "MADT: Forcing active-low polarity and level trigger for SCI\n");
391 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
392 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
393 }
394 }
395
396 /* Third, we register all the I/O APIC's. */
397 for (i = 0; i <= MAX_APIC_ID; i++)
398 if (ioapics[i].io_apic != NULL)
399 ioapic_register(ioapics[i].io_apic);
400
401 /* Finally, we throw the switch to enable the I/O APIC's. */
402 acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
403
404 return (0);
405 }
406
407 static void
408 madt_register(void *dummy __unused)
409 {
410
411 apic_register_enumerator(&madt_enumerator);
412 }
413 SYSINIT(madt_register, SI_SUB_CPU - 1, SI_ORDER_SECOND, madt_register, NULL);
414
415 /*
416 * Call the handler routine for each entry in the MADT table.
417 */
418 static void
419 madt_walk_table(madt_entry_handler *handler, void *arg)
420 {
421 ACPI_SUBTABLE_HEADER *entry;
422 u_char *p, *end;
423
424 end = (u_char *)(madt) + madt->Header.Length;
425 for (p = (u_char *)(madt + 1); p < end; ) {
426 entry = (ACPI_SUBTABLE_HEADER *)p;
427 handler(entry, arg);
428 p += entry->Length;
429 }
430 }
431
432 static void
433 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
434 {
435 ACPI_MADT_LOCAL_APIC *proc;
436 struct lapic_info *la;
437
438 switch (entry->Type) {
439 case ACPI_MADT_TYPE_LOCAL_APIC:
440 /*
441 * The MADT does not include a BSP flag, so we have to
442 * let the MP code figure out which CPU is the BSP on
443 * its own.
444 */
445 proc = (ACPI_MADT_LOCAL_APIC *)entry;
446 if (bootverbose)
447 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n",
448 proc->Id, proc->ProcessorId,
449 (proc->LapicFlags & ACPI_MADT_ENABLED) ?
450 "enabled" : "disabled");
451 if (!(proc->LapicFlags & ACPI_MADT_ENABLED))
452 break;
453 if (proc->Id > MAX_APIC_ID)
454 panic("%s: CPU ID %u too high", __func__, proc->Id);
455 la = &lapics[proc->Id];
456 KASSERT(la->la_enabled == 0,
457 ("Duplicate local APIC ID %u", proc->Id));
458 la->la_enabled = 1;
459 la->la_acpi_id = proc->ProcessorId;
460 lapic_create(proc->Id, 0);
461 break;
462 }
463 }
464
465
466 /*
467 * Add an I/O APIC from an entry in the table.
468 */
469 static void
470 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
471 {
472 ACPI_MADT_IO_APIC *apic;
473
474 switch (entry->Type) {
475 case ACPI_MADT_TYPE_IO_APIC:
476 apic = (ACPI_MADT_IO_APIC *)entry;
477 if (bootverbose)
478 printf(
479 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n",
480 apic->Id, apic->GlobalIrqBase,
481 (void *)(uintptr_t)apic->Address);
482 if (apic->Id > MAX_APIC_ID)
483 panic("%s: I/O APIC ID %u too high", __func__,
484 apic->Id);
485 if (ioapics[apic->Id].io_apic != NULL)
486 panic("%s: Double APIC ID %u", __func__, apic->Id);
487 if (apic->GlobalIrqBase >= FIRST_MSI_INT) {
488 printf("MADT: Ignoring bogus I/O APIC ID %u", apic->Id);
489 break;
490 }
491 ioapics[apic->Id].io_apic = ioapic_create(apic->Address,
492 apic->Id, apic->GlobalIrqBase);
493 ioapics[apic->Id].io_vector = apic->GlobalIrqBase;
494 break;
495 default:
496 break;
497 }
498 }
499
500 /*
501 * Determine properties of an interrupt source. Note that for ACPI these
502 * functions are only used for ISA interrupts, so we assume ISA bus values
503 * (Active Hi, Edge Triggered) for conforming values except for the ACPI
504 * SCI for which we use Active Lo, Level Triggered.
505 */
506 static enum intr_polarity
507 interrupt_polarity(UINT16 IntiFlags, UINT8 Source)
508 {
509
510 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) {
511 case ACPI_MADT_POLARITY_CONFORMS:
512 if (Source == AcpiGbl_FADT.SciInterrupt)
513 return (INTR_POLARITY_LOW);
514 else
515 return (INTR_POLARITY_HIGH);
516 case ACPI_MADT_POLARITY_ACTIVE_HIGH:
517 return (INTR_POLARITY_HIGH);
518 case ACPI_MADT_POLARITY_ACTIVE_LOW:
519 return (INTR_POLARITY_LOW);
520 default:
521 panic("Bogus Interrupt Polarity");
522 }
523 }
524
525 static enum intr_trigger
526 interrupt_trigger(UINT16 IntiFlags, UINT8 Source)
527 {
528
529 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) {
530 case ACPI_MADT_TRIGGER_CONFORMS:
531 if (Source == AcpiGbl_FADT.SciInterrupt)
532 return (INTR_TRIGGER_LEVEL);
533 else
534 return (INTR_TRIGGER_EDGE);
535 case ACPI_MADT_TRIGGER_EDGE:
536 return (INTR_TRIGGER_EDGE);
537 case ACPI_MADT_TRIGGER_LEVEL:
538 return (INTR_TRIGGER_LEVEL);
539 default:
540 panic("Bogus Interrupt Trigger Mode");
541 }
542 }
543
544 /*
545 * Find the local APIC ID associated with a given ACPI Processor ID.
546 */
547 static int
548 madt_find_cpu(u_int acpi_id, u_int *apic_id)
549 {
550 int i;
551
552 for (i = 0; i <= MAX_APIC_ID; i++) {
553 if (!lapics[i].la_enabled)
554 continue;
555 if (lapics[i].la_acpi_id != acpi_id)
556 continue;
557 *apic_id = i;
558 return (0);
559 }
560 return (ENOENT);
561 }
562
563 /*
564 * Find the IO APIC and pin on that APIC associated with a given global
565 * interrupt.
566 */
567 static int
568 madt_find_interrupt(int intr, void **apic, u_int *pin)
569 {
570 int i, best;
571
572 best = -1;
573 for (i = 0; i <= MAX_APIC_ID; i++) {
574 if (ioapics[i].io_apic == NULL ||
575 ioapics[i].io_vector > intr)
576 continue;
577 if (best == -1 ||
578 ioapics[best].io_vector < ioapics[i].io_vector)
579 best = i;
580 }
581 if (best == -1)
582 return (ENOENT);
583 *apic = ioapics[best].io_apic;
584 *pin = intr - ioapics[best].io_vector;
585 if (*pin > 32)
586 printf("WARNING: Found intpin of %u for vector %d\n", *pin,
587 intr);
588 return (0);
589 }
590
591 /*
592 * Parse an interrupt source override for an ISA interrupt.
593 */
594 static void
595 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr)
596 {
597 void *new_ioapic, *old_ioapic;
598 u_int new_pin, old_pin;
599 enum intr_trigger trig;
600 enum intr_polarity pol;
601 char buf[64];
602
603 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 &&
604 intr->GlobalIrq == 2) {
605 if (bootverbose)
606 printf("MADT: Skipping timer override\n");
607 return;
608 }
609 if (bootverbose)
610 printf("MADT: Interrupt override: source %u, irq %u\n",
611 intr->SourceIrq, intr->GlobalIrq);
612 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
613 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) {
614 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n",
615 intr->GlobalIrq, intr->SourceIrq);
616 return;
617 }
618
619 /*
620 * Lookup the appropriate trigger and polarity modes for this
621 * entry.
622 */
623 trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq);
624 pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq);
625
626 /*
627 * If the SCI is identity mapped but has edge trigger and
628 * active-hi polarity or the force_sci_lo tunable is set,
629 * force it to use level/lo.
630 */
631 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) {
632 madt_found_sci_override = 1;
633 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
634 if (tolower(buf[0]) == 'e')
635 trig = INTR_TRIGGER_EDGE;
636 else if (tolower(buf[0]) == 'l')
637 trig = INTR_TRIGGER_LEVEL;
638 else
639 panic(
640 "Invalid trigger %s: must be 'edge' or 'level'",
641 buf);
642 printf("MADT: Forcing SCI to %s trigger\n",
643 trig == INTR_TRIGGER_EDGE ? "edge" : "level");
644 }
645 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
646 if (tolower(buf[0]) == 'h')
647 pol = INTR_POLARITY_HIGH;
648 else if (tolower(buf[0]) == 'l')
649 pol = INTR_POLARITY_LOW;
650 else
651 panic(
652 "Invalid polarity %s: must be 'high' or 'low'",
653 buf);
654 printf("MADT: Forcing SCI to active %s polarity\n",
655 pol == INTR_POLARITY_HIGH ? "high" : "low");
656 }
657 }
658
659 /* Remap the IRQ if it is mapped to a different interrupt vector. */
660 if (intr->SourceIrq != intr->GlobalIrq) {
661 /*
662 * If the SCI is remapped to a non-ISA global interrupt,
663 * then override the vector we use to setup and allocate
664 * the interrupt.
665 */
666 if (intr->GlobalIrq > 15 &&
667 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt)
668 acpi_OverrideInterruptLevel(intr->GlobalIrq);
669 else
670 ioapic_remap_vector(new_ioapic, new_pin,
671 intr->SourceIrq);
672 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic,
673 &old_pin) != 0)
674 printf("MADT: Could not find APIC for source IRQ %u\n",
675 intr->SourceIrq);
676 else if (ioapic_get_vector(old_ioapic, old_pin) ==
677 intr->SourceIrq)
678 ioapic_disable_pin(old_ioapic, old_pin);
679 }
680
681 /* Program the polarity and trigger mode. */
682 ioapic_set_triggermode(new_ioapic, new_pin, trig);
683 ioapic_set_polarity(new_ioapic, new_pin, pol);
684 }
685
686 /*
687 * Parse an entry for an NMI routed to an IO APIC.
688 */
689 static void
690 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi)
691 {
692 void *ioapic;
693 u_int pin;
694
695 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) {
696 printf("MADT: Could not find APIC for vector %u\n",
697 nmi->GlobalIrq);
698 return;
699 }
700
701 ioapic_set_nmi(ioapic, pin);
702 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
703 ioapic_set_triggermode(ioapic, pin,
704 interrupt_trigger(nmi->IntiFlags, 0));
705 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
706 ioapic_set_polarity(ioapic, pin,
707 interrupt_polarity(nmi->IntiFlags, 0));
708 }
709
710 /*
711 * Parse an entry for an NMI routed to a local APIC LVT pin.
712 */
713 static void
714 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi)
715 {
716 u_int apic_id, pin;
717
718 if (nmi->ProcessorId == 0xff)
719 apic_id = APIC_ID_ALL;
720 else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) {
721 if (bootverbose)
722 printf("MADT: Ignoring local NMI routed to "
723 "ACPI CPU %u\n", nmi->ProcessorId);
724 return;
725 }
726 if (nmi->Lint == 0)
727 pin = LVT_LINT0;
728 else
729 pin = LVT_LINT1;
730 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
731 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
732 lapic_set_lvt_triggermode(apic_id, pin,
733 interrupt_trigger(nmi->IntiFlags, 0));
734 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
735 lapic_set_lvt_polarity(apic_id, pin,
736 interrupt_polarity(nmi->IntiFlags, 0));
737 }
738
739 /*
740 * Parse interrupt entries.
741 */
742 static void
743 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
744 {
745
746 switch (entry->Type) {
747 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
748 madt_parse_interrupt_override(
749 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry);
750 break;
751 case ACPI_MADT_TYPE_NMI_SOURCE:
752 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry);
753 break;
754 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
755 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry);
756 break;
757 }
758 }
759
760 /*
761 * Setup per-CPU ACPI IDs.
762 */
763 static void
764 madt_set_ids(void *dummy)
765 {
766 struct lapic_info *la;
767 struct pcpu *pc;
768 u_int i;
769
770 if (madt == NULL)
771 return;
772 for (i = 0; i <= mp_maxid; i++) {
773 if (CPU_ABSENT(i))
774 continue;
775 pc = pcpu_find(i);
776 KASSERT(pc != NULL, ("no pcpu data for CPU %u", i));
777 la = &lapics[pc->pc_apic_id];
778 if (!la->la_enabled)
779 panic("APIC: CPU with APIC ID %u is not enabled",
780 pc->pc_apic_id);
781 pc->pc_acpi_id = la->la_acpi_id;
782 if (bootverbose)
783 printf("APIC: CPU %u has ACPI ID %u\n", i,
784 la->la_acpi_id);
785 }
786 }
787 SYSINIT(madt_set_ids, SI_SUB_CPU, SI_ORDER_ANY, madt_set_ids, NULL);
Cache object: f731ac2af2c83435de8737649d65cd5d
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