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: pages 0 and 1 are used to map in the header of each
113 * table found via the RSDT or XSDT and pages 2 to n are used to map
114 * in the RSDT or XSDT. We have to use 2 pages for the table headers
115 * in case a header spans a page boundary. The offset is in pages;
116 * the length is in bytes.
117 */
118 static void *
119 madt_map(vm_paddr_t pa, int offset, vm_offset_t length)
120 {
121 vm_offset_t va, off;
122 void *data;
123
124 off = pa & PAGE_MASK;
125 length = roundup(length + off, PAGE_SIZE);
126 pa = pa & PG_FRAME;
127 va = (vm_offset_t)pmap_kenter_temporary(pa, offset) +
128 (offset * PAGE_SIZE);
129 data = (void *)(va + off);
130 length -= PAGE_SIZE;
131 while (length > 0) {
132 va += PAGE_SIZE;
133 pa += PAGE_SIZE;
134 length -= PAGE_SIZE;
135 pmap_kenter(va, pa);
136 invlpg(va);
137 }
138 return (data);
139 }
140
141 static void
142 madt_unmap(void *data, vm_offset_t length)
143 {
144 vm_offset_t va, off;
145
146 va = (vm_offset_t)data;
147 off = va & PAGE_MASK;
148 length = roundup(length + off, PAGE_SIZE);
149 va &= ~PAGE_MASK;
150 while (length > 0) {
151 pmap_kremove(va);
152 invlpg(va);
153 va += PAGE_SIZE;
154 length -= PAGE_SIZE;
155 }
156 }
157
158 static void *
159 madt_map_table(vm_paddr_t pa, int offset, const char *sig)
160 {
161 ACPI_TABLE_HEADER *header;
162 vm_offset_t length;
163 void *table;
164
165 header = madt_map(pa, offset, sizeof(ACPI_TABLE_HEADER));
166 if (strncmp(header->Signature, sig, ACPI_NAME_SIZE) != 0) {
167 madt_unmap(header, sizeof(ACPI_TABLE_HEADER));
168 return (NULL);
169 }
170 length = header->Length;
171 madt_unmap(header, sizeof(ACPI_TABLE_HEADER));
172 table = madt_map(pa, offset, length);
173 if (ACPI_FAILURE(AcpiTbChecksum(table, length))) {
174 if (bootverbose)
175 printf("MADT: Failed checksum for table %s\n", sig);
176 madt_unmap(table, length);
177 return (NULL);
178 }
179 return (table);
180 }
181
182 static void
183 madt_unmap_table(void *table)
184 {
185 ACPI_TABLE_HEADER *header;
186
187 header = (ACPI_TABLE_HEADER *)table;
188 madt_unmap(table, header->Length);
189 }
190
191 /*
192 * Look for an ACPI Multiple APIC Description Table ("APIC")
193 */
194 static int
195 madt_probe(void)
196 {
197 ACPI_PHYSICAL_ADDRESS rsdp_ptr;
198 ACPI_TABLE_RSDP *rsdp;
199 ACPI_TABLE_RSDT *rsdt;
200 ACPI_TABLE_XSDT *xsdt;
201 int i, count;
202
203 if (resource_disabled("acpi", 0))
204 return (ENXIO);
205
206 /*
207 * Map in the RSDP. Since ACPI uses AcpiOsMapMemory() which in turn
208 * calls pmap_mapbios() to find the RSDP, we assume that we can use
209 * pmap_mapbios() to map the RSDP.
210 */
211 if ((rsdp_ptr = AcpiOsGetRootPointer()) == 0)
212 return (ENXIO);
213 rsdp = pmap_mapbios(rsdp_ptr, sizeof(ACPI_TABLE_RSDP));
214 if (rsdp == NULL) {
215 if (bootverbose)
216 printf("MADT: Failed to map RSDP\n");
217 return (ENXIO);
218 }
219
220 /*
221 * For ACPI >= 2.0, use the XSDT if it is available.
222 * Otherwise, use the RSDT. We map the XSDT or RSDT at page 1
223 * in the crashdump area. Page 0 is used to map in the
224 * headers of candidate ACPI tables.
225 */
226 if (rsdp->Revision >= 2 && rsdp->XsdtPhysicalAddress != 0) {
227 /*
228 * AcpiOsGetRootPointer only verifies the checksum for
229 * the version 1.0 portion of the RSDP. Version 2.0 has
230 * an additional checksum that we verify first.
231 */
232 if (AcpiTbChecksum((UINT8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH)) {
233 if (bootverbose)
234 printf("MADT: RSDP failed extended checksum\n");
235 return (ENXIO);
236 }
237 xsdt = madt_map_table(rsdp->XsdtPhysicalAddress, 2,
238 ACPI_SIG_XSDT);
239 if (xsdt == NULL) {
240 if (bootverbose)
241 printf("MADT: Failed to map XSDT\n");
242 return (ENXIO);
243 }
244 count = (xsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
245 sizeof(UINT64);
246 for (i = 0; i < count; i++)
247 if (madt_probe_table(xsdt->TableOffsetEntry[i]))
248 break;
249 madt_unmap_table(xsdt);
250 } else {
251 rsdt = madt_map_table(rsdp->RsdtPhysicalAddress, 2,
252 ACPI_SIG_RSDT);
253 if (rsdt == NULL) {
254 if (bootverbose)
255 printf("MADT: Failed to map RSDT\n");
256 return (ENXIO);
257 }
258 count = (rsdt->Header.Length - sizeof(ACPI_TABLE_HEADER)) /
259 sizeof(UINT32);
260 for (i = 0; i < count; i++)
261 if (madt_probe_table(rsdt->TableOffsetEntry[i]))
262 break;
263 madt_unmap_table(rsdt);
264 }
265 pmap_unmapbios((vm_offset_t)rsdp, sizeof(ACPI_TABLE_RSDP));
266 if (madt_physaddr == 0) {
267 if (bootverbose)
268 printf("MADT: No MADT table found\n");
269 return (ENXIO);
270 }
271 if (bootverbose)
272 printf("MADT: Found table at 0x%jx\n",
273 (uintmax_t)madt_physaddr);
274
275 /*
276 * Verify that we can map the full table and that its checksum is
277 * correct, etc.
278 */
279 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT);
280 if (madt == NULL)
281 return (ENXIO);
282 madt_unmap_table(madt);
283 madt = NULL;
284
285 return (0);
286 }
287
288 /*
289 * See if a given ACPI table is the MADT.
290 */
291 static int
292 madt_probe_table(vm_paddr_t address)
293 {
294 ACPI_TABLE_HEADER *table;
295
296 table = madt_map(address, 0, sizeof(ACPI_TABLE_HEADER));
297 if (table == NULL) {
298 if (bootverbose)
299 printf("MADT: Failed to map table at 0x%jx\n",
300 (uintmax_t)address);
301 return (0);
302 }
303 if (bootverbose)
304 printf("Table '%.4s' at 0x%jx\n", table->Signature,
305 (uintmax_t)address);
306
307 if (strncmp(table->Signature, ACPI_SIG_MADT, ACPI_NAME_SIZE) != 0) {
308 madt_unmap(table, sizeof(ACPI_TABLE_HEADER));
309 return (0);
310 }
311 madt_physaddr = address;
312 madt_length = table->Length;
313 madt_unmap(table, sizeof(ACPI_TABLE_HEADER));
314 return (1);
315 }
316
317 /*
318 * Run through the MP table enumerating CPUs.
319 */
320 static int
321 madt_probe_cpus(void)
322 {
323
324 madt = madt_map_table(madt_physaddr, 0, ACPI_SIG_MADT);
325 KASSERT(madt != NULL, ("Unable to re-map MADT"));
326 madt_walk_table(madt_probe_cpus_handler, NULL);
327 madt_unmap_table(madt);
328 madt = NULL;
329 return (0);
330 }
331
332 /*
333 * Initialize the local APIC on the BSP.
334 */
335 static int
336 madt_setup_local(void)
337 {
338
339 madt = pmap_mapbios(madt_physaddr, madt_length);
340 lapic_init(madt->Address);
341 printf("ACPI APIC Table: <%.*s %.*s>\n",
342 (int)sizeof(madt->Header.OemId), madt->Header.OemId,
343 (int)sizeof(madt->Header.OemTableId), madt->Header.OemTableId);
344
345 /*
346 * We ignore 64-bit local APIC override entries. Should we
347 * perhaps emit a warning here if we find one?
348 */
349 return (0);
350 }
351
352 /*
353 * Enumerate I/O APICs and setup interrupt sources.
354 */
355 static int
356 madt_setup_io(void)
357 {
358 void *ioapic;
359 u_int pin;
360 int i;
361
362 /* Try to initialize ACPI so that we can access the FADT. */
363 i = acpi_Startup();
364 if (ACPI_FAILURE(i)) {
365 printf("MADT: ACPI Startup failed with %s\n",
366 AcpiFormatException(i));
367 printf("Try disabling either ACPI or apic support.\n");
368 panic("Using MADT but ACPI doesn't work");
369 }
370
371 /* First, we run through adding I/O APIC's. */
372 madt_walk_table(madt_parse_apics, NULL);
373
374 /* Second, we run through the table tweaking interrupt sources. */
375 madt_walk_table(madt_parse_ints, NULL);
376
377 /*
378 * If there was not an explicit override entry for the SCI,
379 * force it to use level trigger and active-low polarity.
380 */
381 if (!madt_found_sci_override) {
382 if (madt_find_interrupt(AcpiGbl_FADT.SciInterrupt, &ioapic,
383 &pin) != 0)
384 printf("MADT: Could not find APIC for SCI IRQ %u\n",
385 AcpiGbl_FADT.SciInterrupt);
386 else {
387 printf(
388 "MADT: Forcing active-low polarity and level trigger for SCI\n");
389 ioapic_set_polarity(ioapic, pin, INTR_POLARITY_LOW);
390 ioapic_set_triggermode(ioapic, pin, INTR_TRIGGER_LEVEL);
391 }
392 }
393
394 /* Third, we register all the I/O APIC's. */
395 for (i = 0; i <= MAX_APIC_ID; i++)
396 if (ioapics[i].io_apic != NULL)
397 ioapic_register(ioapics[i].io_apic);
398
399 /* Finally, we throw the switch to enable the I/O APIC's. */
400 acpi_SetDefaultIntrModel(ACPI_INTR_APIC);
401
402 return (0);
403 }
404
405 static void
406 madt_register(void *dummy __unused)
407 {
408
409 apic_register_enumerator(&madt_enumerator);
410 }
411 SYSINIT(madt_register, SI_SUB_CPU - 1, SI_ORDER_SECOND, madt_register, NULL);
412
413 /*
414 * Call the handler routine for each entry in the MADT table.
415 */
416 static void
417 madt_walk_table(madt_entry_handler *handler, void *arg)
418 {
419 ACPI_SUBTABLE_HEADER *entry;
420 u_char *p, *end;
421
422 end = (u_char *)(madt) + madt->Header.Length;
423 for (p = (u_char *)(madt + 1); p < end; ) {
424 entry = (ACPI_SUBTABLE_HEADER *)p;
425 handler(entry, arg);
426 p += entry->Length;
427 }
428 }
429
430 static void
431 madt_probe_cpus_handler(ACPI_SUBTABLE_HEADER *entry, void *arg)
432 {
433 ACPI_MADT_LOCAL_APIC *proc;
434 struct lapic_info *la;
435
436 switch (entry->Type) {
437 case ACPI_MADT_TYPE_LOCAL_APIC:
438 /*
439 * The MADT does not include a BSP flag, so we have to
440 * let the MP code figure out which CPU is the BSP on
441 * its own.
442 */
443 proc = (ACPI_MADT_LOCAL_APIC *)entry;
444 if (bootverbose)
445 printf("MADT: Found CPU APIC ID %u ACPI ID %u: %s\n",
446 proc->Id, proc->ProcessorId,
447 (proc->LapicFlags & ACPI_MADT_ENABLED) ?
448 "enabled" : "disabled");
449 if (!(proc->LapicFlags & ACPI_MADT_ENABLED))
450 break;
451 if (proc->Id > MAX_APIC_ID)
452 panic("%s: CPU ID %u too high", __func__, proc->Id);
453 la = &lapics[proc->Id];
454 KASSERT(la->la_enabled == 0,
455 ("Duplicate local APIC ID %u", proc->Id));
456 la->la_enabled = 1;
457 la->la_acpi_id = proc->ProcessorId;
458 lapic_create(proc->Id, 0);
459 break;
460 }
461 }
462
463
464 /*
465 * Add an I/O APIC from an entry in the table.
466 */
467 static void
468 madt_parse_apics(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
469 {
470 ACPI_MADT_IO_APIC *apic;
471
472 switch (entry->Type) {
473 case ACPI_MADT_TYPE_IO_APIC:
474 apic = (ACPI_MADT_IO_APIC *)entry;
475 if (bootverbose)
476 printf(
477 "MADT: Found IO APIC ID %u, Interrupt %u at %p\n",
478 apic->Id, apic->GlobalIrqBase,
479 (void *)(uintptr_t)apic->Address);
480 if (apic->Id > MAX_APIC_ID)
481 panic("%s: I/O APIC ID %u too high", __func__,
482 apic->Id);
483 if (ioapics[apic->Id].io_apic != NULL)
484 panic("%s: Double APIC ID %u", __func__, apic->Id);
485 ioapics[apic->Id].io_apic = ioapic_create(apic->Address,
486 apic->Id, apic->GlobalIrqBase);
487 ioapics[apic->Id].io_vector = apic->GlobalIrqBase;
488 break;
489 default:
490 break;
491 }
492 }
493
494 /*
495 * Determine properties of an interrupt source. Note that for ACPI these
496 * functions are only used for ISA interrupts, so we assume ISA bus values
497 * (Active Hi, Edge Triggered) for conforming values except for the ACPI
498 * SCI for which we use Active Lo, Level Triggered.
499 */
500 static enum intr_polarity
501 interrupt_polarity(UINT16 IntiFlags, UINT8 Source)
502 {
503
504 switch (IntiFlags & ACPI_MADT_POLARITY_MASK) {
505 case ACPI_MADT_POLARITY_CONFORMS:
506 if (Source == AcpiGbl_FADT.SciInterrupt)
507 return (INTR_POLARITY_LOW);
508 else
509 return (INTR_POLARITY_HIGH);
510 case ACPI_MADT_POLARITY_ACTIVE_HIGH:
511 return (INTR_POLARITY_HIGH);
512 case ACPI_MADT_POLARITY_ACTIVE_LOW:
513 return (INTR_POLARITY_LOW);
514 default:
515 panic("Bogus Interrupt Polarity");
516 }
517 }
518
519 static enum intr_trigger
520 interrupt_trigger(UINT16 IntiFlags, UINT8 Source)
521 {
522
523 switch (IntiFlags & ACPI_MADT_TRIGGER_MASK) {
524 case ACPI_MADT_TRIGGER_CONFORMS:
525 if (Source == AcpiGbl_FADT.SciInterrupt)
526 return (INTR_TRIGGER_LEVEL);
527 else
528 return (INTR_TRIGGER_EDGE);
529 case ACPI_MADT_TRIGGER_EDGE:
530 return (INTR_TRIGGER_EDGE);
531 case ACPI_MADT_TRIGGER_LEVEL:
532 return (INTR_TRIGGER_LEVEL);
533 default:
534 panic("Bogus Interrupt Trigger Mode");
535 }
536 }
537
538 /*
539 * Find the local APIC ID associated with a given ACPI Processor ID.
540 */
541 static int
542 madt_find_cpu(u_int acpi_id, u_int *apic_id)
543 {
544 int i;
545
546 for (i = 0; i <= MAX_APIC_ID; i++) {
547 if (!lapics[i].la_enabled)
548 continue;
549 if (lapics[i].la_acpi_id != acpi_id)
550 continue;
551 *apic_id = i;
552 return (0);
553 }
554 return (ENOENT);
555 }
556
557 /*
558 * Find the IO APIC and pin on that APIC associated with a given global
559 * interrupt.
560 */
561 static int
562 madt_find_interrupt(int intr, void **apic, u_int *pin)
563 {
564 int i, best;
565
566 best = -1;
567 for (i = 0; i <= MAX_APIC_ID; i++) {
568 if (ioapics[i].io_apic == NULL ||
569 ioapics[i].io_vector > intr)
570 continue;
571 if (best == -1 ||
572 ioapics[best].io_vector < ioapics[i].io_vector)
573 best = i;
574 }
575 if (best == -1)
576 return (ENOENT);
577 *apic = ioapics[best].io_apic;
578 *pin = intr - ioapics[best].io_vector;
579 if (*pin > 32)
580 printf("WARNING: Found intpin of %u for vector %d\n", *pin,
581 intr);
582 return (0);
583 }
584
585 /*
586 * Parse an interrupt source override for an ISA interrupt.
587 */
588 static void
589 madt_parse_interrupt_override(ACPI_MADT_INTERRUPT_OVERRIDE *intr)
590 {
591 void *new_ioapic, *old_ioapic;
592 u_int new_pin, old_pin;
593 enum intr_trigger trig;
594 enum intr_polarity pol;
595 char buf[64];
596
597 if (acpi_quirks & ACPI_Q_MADT_IRQ0 && intr->SourceIrq == 0 &&
598 intr->GlobalIrq == 2) {
599 if (bootverbose)
600 printf("MADT: Skipping timer override\n");
601 return;
602 }
603 if (bootverbose)
604 printf("MADT: Interrupt override: source %u, irq %u\n",
605 intr->SourceIrq, intr->GlobalIrq);
606 KASSERT(intr->Bus == 0, ("bus for interrupt overrides must be zero"));
607 if (madt_find_interrupt(intr->GlobalIrq, &new_ioapic, &new_pin) != 0) {
608 printf("MADT: Could not find APIC for vector %u (IRQ %u)\n",
609 intr->GlobalIrq, intr->SourceIrq);
610 return;
611 }
612
613 /*
614 * Lookup the appropriate trigger and polarity modes for this
615 * entry.
616 */
617 trig = interrupt_trigger(intr->IntiFlags, intr->SourceIrq);
618 pol = interrupt_polarity(intr->IntiFlags, intr->SourceIrq);
619
620 /*
621 * If the SCI is identity mapped but has edge trigger and
622 * active-hi polarity or the force_sci_lo tunable is set,
623 * force it to use level/lo.
624 */
625 if (intr->SourceIrq == AcpiGbl_FADT.SciInterrupt) {
626 madt_found_sci_override = 1;
627 if (getenv_string("hw.acpi.sci.trigger", buf, sizeof(buf))) {
628 if (tolower(buf[0]) == 'e')
629 trig = INTR_TRIGGER_EDGE;
630 else if (tolower(buf[0]) == 'l')
631 trig = INTR_TRIGGER_LEVEL;
632 else
633 panic(
634 "Invalid trigger %s: must be 'edge' or 'level'",
635 buf);
636 printf("MADT: Forcing SCI to %s trigger\n",
637 trig == INTR_TRIGGER_EDGE ? "edge" : "level");
638 }
639 if (getenv_string("hw.acpi.sci.polarity", buf, sizeof(buf))) {
640 if (tolower(buf[0]) == 'h')
641 pol = INTR_POLARITY_HIGH;
642 else if (tolower(buf[0]) == 'l')
643 pol = INTR_POLARITY_LOW;
644 else
645 panic(
646 "Invalid polarity %s: must be 'high' or 'low'",
647 buf);
648 printf("MADT: Forcing SCI to active %s polarity\n",
649 pol == INTR_POLARITY_HIGH ? "high" : "low");
650 }
651 }
652
653 /* Remap the IRQ if it is mapped to a different interrupt vector. */
654 if (intr->SourceIrq != intr->GlobalIrq) {
655 /*
656 * If the SCI is remapped to a non-ISA global interrupt,
657 * then override the vector we use to setup and allocate
658 * the interrupt.
659 */
660 if (intr->GlobalIrq > 15 &&
661 intr->SourceIrq == AcpiGbl_FADT.SciInterrupt)
662 acpi_OverrideInterruptLevel(intr->GlobalIrq);
663 else
664 ioapic_remap_vector(new_ioapic, new_pin,
665 intr->SourceIrq);
666 if (madt_find_interrupt(intr->SourceIrq, &old_ioapic,
667 &old_pin) != 0)
668 printf("MADT: Could not find APIC for source IRQ %u\n",
669 intr->SourceIrq);
670 else if (ioapic_get_vector(old_ioapic, old_pin) ==
671 intr->SourceIrq)
672 ioapic_disable_pin(old_ioapic, old_pin);
673 }
674
675 /* Program the polarity and trigger mode. */
676 ioapic_set_triggermode(new_ioapic, new_pin, trig);
677 ioapic_set_polarity(new_ioapic, new_pin, pol);
678 }
679
680 /*
681 * Parse an entry for an NMI routed to an IO APIC.
682 */
683 static void
684 madt_parse_nmi(ACPI_MADT_NMI_SOURCE *nmi)
685 {
686 void *ioapic;
687 u_int pin;
688
689 if (madt_find_interrupt(nmi->GlobalIrq, &ioapic, &pin) != 0) {
690 printf("MADT: Could not find APIC for vector %u\n",
691 nmi->GlobalIrq);
692 return;
693 }
694
695 ioapic_set_nmi(ioapic, pin);
696 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
697 ioapic_set_triggermode(ioapic, pin,
698 interrupt_trigger(nmi->IntiFlags, 0));
699 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
700 ioapic_set_polarity(ioapic, pin,
701 interrupt_polarity(nmi->IntiFlags, 0));
702 }
703
704 /*
705 * Parse an entry for an NMI routed to a local APIC LVT pin.
706 */
707 static void
708 madt_parse_local_nmi(ACPI_MADT_LOCAL_APIC_NMI *nmi)
709 {
710 u_int apic_id, pin;
711
712 if (nmi->ProcessorId == 0xff)
713 apic_id = APIC_ID_ALL;
714 else if (madt_find_cpu(nmi->ProcessorId, &apic_id) != 0) {
715 if (bootverbose)
716 printf("MADT: Ignoring local NMI routed to "
717 "ACPI CPU %u\n", nmi->ProcessorId);
718 return;
719 }
720 if (nmi->Lint == 0)
721 pin = LVT_LINT0;
722 else
723 pin = LVT_LINT1;
724 lapic_set_lvt_mode(apic_id, pin, APIC_LVT_DM_NMI);
725 if (!(nmi->IntiFlags & ACPI_MADT_TRIGGER_CONFORMS))
726 lapic_set_lvt_triggermode(apic_id, pin,
727 interrupt_trigger(nmi->IntiFlags, 0));
728 if (!(nmi->IntiFlags & ACPI_MADT_POLARITY_CONFORMS))
729 lapic_set_lvt_polarity(apic_id, pin,
730 interrupt_polarity(nmi->IntiFlags, 0));
731 }
732
733 /*
734 * Parse interrupt entries.
735 */
736 static void
737 madt_parse_ints(ACPI_SUBTABLE_HEADER *entry, void *arg __unused)
738 {
739
740 switch (entry->Type) {
741 case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
742 madt_parse_interrupt_override(
743 (ACPI_MADT_INTERRUPT_OVERRIDE *)entry);
744 break;
745 case ACPI_MADT_TYPE_NMI_SOURCE:
746 madt_parse_nmi((ACPI_MADT_NMI_SOURCE *)entry);
747 break;
748 case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
749 madt_parse_local_nmi((ACPI_MADT_LOCAL_APIC_NMI *)entry);
750 break;
751 }
752 }
753
754 /*
755 * Setup per-CPU ACPI IDs.
756 */
757 static void
758 madt_set_ids(void *dummy)
759 {
760 struct lapic_info *la;
761 struct pcpu *pc;
762 u_int i;
763
764 if (madt == NULL)
765 return;
766 for (i = 0; i <= mp_maxid; i++) {
767 if (CPU_ABSENT(i))
768 continue;
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_ANY, madt_set_ids, NULL);
Cache object: 3855385b2ed85572bcf3b03f8023696a
|