acpi/sci: Test ACPI MADT interrupt override entry's preferred mode first
[dragonfly.git] / sys / platform / pc32 / acpica5 / acpi_madt.c
1 /*
2  * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
3  * 
4  * This code is derived from software contributed to The DragonFly Project
5  * by Sepherosa Ziehau <sepherosa@gmail.com>
6  * 
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in
15  *    the documentation and/or other materials provided with the
16  *    distribution.
17  * 3. Neither the name of The DragonFly Project nor the names of its
18  *    contributors may be used to endorse or promote products derived
19  *    from this software without specific, prior written permission.
20  * 
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34
35 #include <sys/param.h>
36 #include <sys/bus.h>
37 #include <sys/kernel.h>
38 #include <sys/systm.h>
39
40 #include <machine_base/isa/isa_intr.h>
41 #include <machine_base/apic/lapic.h>
42 #include <machine_base/apic/ioapic.h>
43 #include <machine_base/apic/apicvar.h>
44
45 #include "acpi_sdt.h"
46 #include "acpi_sdt_var.h"
47 #include "acpi_sci_var.h"
48
49 extern int naps;
50
51 #define MADT_VPRINTF(fmt, arg...) \
52 do { \
53         if (bootverbose) \
54                 kprintf("ACPI MADT: " fmt , ##arg); \
55 } while (0)
56
57 /* Multiple APIC Description Table */
58 struct acpi_madt {
59         struct acpi_sdth        madt_hdr;
60         uint32_t                madt_lapic_addr;
61         uint32_t                madt_flags;
62         uint8_t                 madt_ents[1];
63 } __packed;
64
65 /* Common parts of MADT APIC structure */
66 struct acpi_madt_ent {
67         uint8_t                 me_type;        /* MADT_ENT_ */
68         uint8_t                 me_len;
69 } __packed;
70
71 #define MADT_ENT_LAPIC          0
72 #define MADT_ENT_IOAPIC         1
73 #define MADT_ENT_INTSRC         2
74 #define MADT_ENT_LAPIC_ADDR     5
75
76 /* MADT Processor Local APIC */
77 struct acpi_madt_lapic {
78         struct acpi_madt_ent    ml_hdr;
79         uint8_t                 ml_cpu_id;
80         uint8_t                 ml_apic_id;
81         uint32_t                ml_flags;       /* MADT_LAPIC_ */
82 } __packed;
83
84 #define MADT_LAPIC_ENABLED      0x1
85
86 /* MADT I/O APIC */
87 struct acpi_madt_ioapic {
88         struct acpi_madt_ent    mio_hdr;
89         uint8_t                 mio_apic_id;
90         uint8_t                 mio_reserved;
91         uint32_t                mio_addr;
92         uint32_t                mio_gsi_base;
93 } __packed;
94
95 /* MADT Interrupt Source Override */
96 struct acpi_madt_intsrc {
97         struct acpi_madt_ent    mint_hdr;
98         uint8_t                 mint_bus;       /* MADT_INT_BUS_ */
99         uint8_t                 mint_src;
100         uint32_t                mint_gsi;
101         uint16_t                mint_flags;     /* MADT_INT_ */
102 } __packed;
103
104 #define MADT_INT_BUS_ISA        0
105
106 #define MADT_INT_POLA_MASK      0x3
107 #define MADT_INT_POLA_SHIFT     0
108 #define MADT_INT_POLA_CONFORM   0
109 #define MADT_INT_POLA_HIGH      1
110 #define MADT_INT_POLA_RSVD      2
111 #define MADT_INT_POLA_LOW       3
112 #define MADT_INT_TRIG_MASK      0xc
113 #define MADT_INT_TRIG_SHIFT     2
114 #define MADT_INT_TRIG_CONFORM   0
115 #define MADT_INT_TRIG_EDGE      1
116 #define MADT_INT_TRIG_RSVD      2
117 #define MADT_INT_TRIG_LEVEL     3
118
119 /* MADT Local APIC Address Override */
120 struct acpi_madt_lapic_addr {
121         struct acpi_madt_ent    mla_hdr;
122         uint16_t                mla_reserved;
123         uint64_t                mla_lapic_addr;
124 } __packed;
125
126 typedef int                     (*madt_iter_t)(void *,
127                                     const struct acpi_madt_ent *);
128
129 static int                      madt_check(vm_paddr_t);
130 static int                      madt_iterate_entries(struct acpi_madt *,
131                                     madt_iter_t, void *);
132
133 static vm_paddr_t               madt_lapic_pass1(void);
134 static int                      madt_lapic_pass2(int);
135
136 static int                      madt_lapic_enumerate(struct lapic_enumerator *);
137 static int                      madt_lapic_probe(struct lapic_enumerator *);
138
139 static void                     madt_ioapic_enumerate(
140                                     struct ioapic_enumerator *);
141 static int                      madt_ioapic_probe(struct ioapic_enumerator *);
142
143 static vm_paddr_t               madt_phyaddr;
144
145 static void
146 madt_probe(void)
147 {
148         vm_paddr_t madt_paddr;
149
150         KKASSERT(madt_phyaddr == 0);
151
152         madt_paddr = sdt_search(ACPI_MADT_SIG);
153         if (madt_paddr == 0) {
154                 kprintf("madt_probe: can't locate MADT\n");
155                 return;
156         }
157
158         /* Preliminary checks */
159         if (madt_check(madt_paddr)) {
160                 kprintf("madt_probe: madt_check failed\n");
161                 return;
162         }
163
164         madt_phyaddr = madt_paddr;
165 }
166 SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, madt_probe, 0);
167
168 static int
169 madt_check(vm_paddr_t madt_paddr)
170 {
171         struct acpi_madt *madt;
172         int error = 0;
173
174         KKASSERT(madt_paddr != 0);
175
176         madt = sdt_sdth_map(madt_paddr);
177         KKASSERT(madt != NULL);
178
179         /*
180          * MADT in ACPI specification 1.0 - 4.0
181          */
182         if (madt->madt_hdr.sdth_rev < 1 || madt->madt_hdr.sdth_rev > 3) {
183                 kprintf("madt_check: unsupported MADT revision %d\n",
184                         madt->madt_hdr.sdth_rev);
185                 error = EOPNOTSUPP;
186                 goto back;
187         }
188
189         if (madt->madt_hdr.sdth_len <
190             sizeof(*madt) - sizeof(madt->madt_ents)) {
191                 kprintf("madt_check: invalid MADT length %u\n",
192                         madt->madt_hdr.sdth_len);
193                 error = EINVAL;
194                 goto back;
195         }
196 back:
197         sdt_sdth_unmap(&madt->madt_hdr);
198         return error;
199 }
200
201 static int
202 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
203 {
204         int size, cur, error;
205
206         size = madt->madt_hdr.sdth_len -
207                (sizeof(*madt) - sizeof(madt->madt_ents));
208         cur = 0;
209         error = 0;
210
211         while (size - cur > sizeof(struct acpi_madt_ent)) {
212                 const struct acpi_madt_ent *ent;
213
214                 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
215                 if (ent->me_len < sizeof(*ent)) {
216                         kprintf("madt_iterate_entries: invalid MADT "
217                                 "entry len %d\n", ent->me_len);
218                         error = EINVAL;
219                         break;
220                 }
221                 if (ent->me_len > (size - cur)) {
222                         kprintf("madt_iterate_entries: invalid MADT "
223                                 "entry len %d, > table length\n", ent->me_len);
224                         error = EINVAL;
225                         break;
226                 }
227
228                 cur += ent->me_len;
229
230                 /*
231                  * Only Local APIC, I/O APIC and Interrupt Source Override
232                  * are defined in ACPI specification 1.0 - 4.0
233                  */
234                 switch (ent->me_type) {
235                 case MADT_ENT_LAPIC:
236                         if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
237                                 kprintf("madt_iterate_entries: invalid MADT "
238                                         "lapic entry len %d\n", ent->me_len);
239                                 error = EINVAL;
240                         }
241                         break;
242
243                 case MADT_ENT_IOAPIC:
244                         if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
245                                 kprintf("madt_iterate_entries: invalid MADT "
246                                         "ioapic entry len %d\n", ent->me_len);
247                                 error = EINVAL;
248                         }
249                         break;
250
251                 case MADT_ENT_INTSRC:
252                         if (ent->me_len < sizeof(struct acpi_madt_intsrc)) {
253                                 kprintf("madt_iterate_entries: invalid MADT "
254                                         "intsrc entry len %d\n",
255                                         ent->me_len);
256                                 error = EINVAL;
257                         }
258                         break;
259                 }
260                 if (error)
261                         break;
262
263                 error = func(arg, ent);
264                 if (error)
265                         break;
266         }
267         return error;
268 }
269
270 static int
271 madt_lapic_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
272 {
273         const struct acpi_madt_lapic_addr *lapic_addr_ent;
274         uint64_t *addr64 = xarg;
275
276         if (ent->me_type != MADT_ENT_LAPIC_ADDR)
277                 return 0;
278         if (ent->me_len < sizeof(*lapic_addr_ent)) {
279                 kprintf("madt_lapic_pass1: "
280                         "invalid LAPIC address override length\n");
281                 return 0;
282         }
283         lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
284
285         *addr64 = lapic_addr_ent->mla_lapic_addr;
286         return 0;
287 }
288
289 static vm_paddr_t
290 madt_lapic_pass1(void)
291 {
292         struct acpi_madt *madt;
293         vm_paddr_t lapic_addr;
294         uint64_t lapic_addr64;
295         int error;
296
297         KKASSERT(madt_phyaddr != 0);
298
299         madt = sdt_sdth_map(madt_phyaddr);
300         KKASSERT(madt != NULL);
301
302         MADT_VPRINTF("LAPIC address 0x%x, flags %#x\n",
303                      madt->madt_lapic_addr, madt->madt_flags);
304         lapic_addr = madt->madt_lapic_addr;
305
306         lapic_addr64 = 0;
307         error = madt_iterate_entries(madt, madt_lapic_pass1_callback,
308                                      &lapic_addr64);
309         if (error)
310                 panic("madt_iterate_entries(pass1) failed");
311
312         if (lapic_addr64 != 0) {
313                 kprintf("ACPI MADT: warning 64bits lapic address 0x%llx\n",
314                         lapic_addr64);
315                 lapic_addr = lapic_addr64;
316         }
317
318         sdt_sdth_unmap(&madt->madt_hdr);
319
320         return lapic_addr;
321 }
322
323 struct madt_lapic_pass2_cbarg {
324         int     cpu;
325         int     bsp_found;
326         int     bsp_apic_id;
327 };
328
329 static int
330 madt_lapic_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
331 {
332         const struct acpi_madt_lapic *lapic_ent;
333         struct madt_lapic_pass2_cbarg *arg = xarg;
334
335         if (ent->me_type != MADT_ENT_LAPIC)
336                 return 0;
337
338         lapic_ent = (const struct acpi_madt_lapic *)ent;
339         if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
340                 MADT_VPRINTF("cpu id %d, apic id %d\n",
341                              lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
342                 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
343                         lapic_set_cpuid(0, lapic_ent->ml_apic_id);
344                         arg->bsp_found = 1;
345                 } else {
346                         lapic_set_cpuid(arg->cpu, lapic_ent->ml_apic_id);
347                         arg->cpu++;
348                 }
349         }
350         return 0;
351 }
352
353 static int
354 madt_lapic_pass2(int bsp_apic_id)
355 {
356         struct acpi_madt *madt;
357         struct madt_lapic_pass2_cbarg arg;
358         int error;
359
360         MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
361
362         KKASSERT(madt_phyaddr != 0);
363
364         madt = sdt_sdth_map(madt_phyaddr);
365         KKASSERT(madt != NULL);
366
367         bzero(&arg, sizeof(arg));
368         arg.cpu = 1;
369         arg.bsp_apic_id = bsp_apic_id;
370
371         error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg);
372         if (error)
373                 panic("madt_iterate_entries(pass2) failed");
374
375         KKASSERT(arg.bsp_found);
376         naps = arg.cpu - 1; /* exclude BSP */
377
378         sdt_sdth_unmap(&madt->madt_hdr);
379
380         return 0;
381 }
382
383 struct madt_lapic_probe_cbarg {
384         int             cpu_count;
385         vm_paddr_t      lapic_addr;
386 };
387
388 static int
389 madt_lapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
390 {
391         struct madt_lapic_probe_cbarg *arg = xarg;
392
393         if (ent->me_type == MADT_ENT_LAPIC) {
394                 const struct acpi_madt_lapic *lapic_ent;
395
396                 lapic_ent = (const struct acpi_madt_lapic *)ent;
397                 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
398                         arg->cpu_count++;
399                         if (lapic_ent->ml_apic_id == APICID_MAX) {
400                                 kprintf("madt_lapic_probe: "
401                                     "invalid LAPIC apic id %d\n",
402                                     lapic_ent->ml_apic_id);
403                                 return EINVAL;
404                         }
405                 }
406         } else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
407                 const struct acpi_madt_lapic_addr *lapic_addr_ent;
408
409                 if (ent->me_len < sizeof(*lapic_addr_ent)) {
410                         kprintf("madt_lapic_probe: "
411                                 "invalid LAPIC address override length\n");
412                         return 0;
413                 }
414                 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
415
416                 if (lapic_addr_ent->mla_lapic_addr != 0)
417                         arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
418         }
419         return 0;
420 }
421
422 static int
423 madt_lapic_probe(struct lapic_enumerator *e)
424 {
425         struct madt_lapic_probe_cbarg arg;
426         struct acpi_madt *madt;
427         int error;
428
429         if (madt_phyaddr == 0)
430                 return ENXIO;
431
432         madt = sdt_sdth_map(madt_phyaddr);
433         KKASSERT(madt != NULL);
434
435         bzero(&arg, sizeof(arg));
436         arg.lapic_addr = madt->madt_lapic_addr;
437
438         error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
439         if (!error) {
440                 if (arg.cpu_count == 0) {
441                         kprintf("madt_lapic_probe: no CPU is found\n");
442                         error = EOPNOTSUPP;
443                 }
444                 if (arg.lapic_addr == 0) {
445                         kprintf("madt_lapic_probe: zero LAPIC address\n");
446                         error = EOPNOTSUPP;
447                 }
448         }
449
450         sdt_sdth_unmap(&madt->madt_hdr);
451         return error;
452 }
453
454 static int
455 madt_lapic_enumerate(struct lapic_enumerator *e)
456 {
457         vm_paddr_t lapic_addr;
458         int bsp_apic_id;
459
460         KKASSERT(madt_phyaddr != 0);
461
462         lapic_addr = madt_lapic_pass1();
463         if (lapic_addr == 0)
464                 panic("madt_lapic_enumerate: no local apic");
465
466         lapic_map(lapic_addr);
467
468         bsp_apic_id = APIC_ID(lapic->id);
469         if (bsp_apic_id == APICID_MAX) {
470                 /*
471                  * XXX
472                  * Some old brain dead BIOS will set BSP's LAPIC apic id
473                  * to 255, though all LAPIC entries in MADT are valid.
474                  */
475                 kprintf("%s invalid BSP LAPIC apic id %d\n", __func__,
476                     bsp_apic_id);
477                 return EINVAL;
478         }
479
480         if (madt_lapic_pass2(bsp_apic_id))
481                 panic("madt_lapic_enumerate: madt_lapic_pass2 failed");
482
483         return 0;
484 }
485
486 static struct lapic_enumerator  madt_lapic_enumerator = {
487         .lapic_prio = LAPIC_ENUM_PRIO_MADT,
488         .lapic_probe = madt_lapic_probe,
489         .lapic_enumerate = madt_lapic_enumerate
490 };
491
492 static void
493 madt_lapic_enum_register(void)
494 {
495         int prio;
496
497         prio = LAPIC_ENUM_PRIO_MADT;
498         kgetenv_int("hw.madt_lapic_prio", &prio);
499         madt_lapic_enumerator.lapic_prio = prio;
500
501         lapic_enumerator_register(&madt_lapic_enumerator);
502 }
503 SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0);
504
505 struct madt_ioapic_probe_cbarg {
506         int     ioapic_cnt;
507         int     gsi_base0;
508 };
509
510 static int
511 madt_ioapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
512 {
513         struct madt_ioapic_probe_cbarg *arg = xarg;
514
515         if (ent->me_type == MADT_ENT_INTSRC) {
516                 const struct acpi_madt_intsrc *intsrc_ent;
517                 int trig, pola;
518
519                 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
520
521                 if (intsrc_ent->mint_src >= ISA_IRQ_CNT) {
522                         kprintf("madt_ioapic_probe: invalid intsrc irq (%d)\n",
523                                 intsrc_ent->mint_src);
524                         return EINVAL;
525                 }
526
527                 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) {
528                         kprintf("ACPI MADT: warning intsrc irq %d "
529                                 "bus is not ISA (%d)\n",
530                                 intsrc_ent->mint_src, intsrc_ent->mint_bus);
531                 }
532
533                 trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
534                        MADT_INT_TRIG_SHIFT;
535                 if (trig == MADT_INT_TRIG_RSVD) {
536                         kprintf("ACPI MADT: warning invalid intsrc irq %d "
537                                 "trig, reserved\n", intsrc_ent->mint_src);
538                 } else if (trig == MADT_INT_TRIG_LEVEL) {
539                         MADT_VPRINTF("warning invalid intsrc irq %d "
540                             "trig, level\n", intsrc_ent->mint_src);
541                 }
542
543                 pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
544                        MADT_INT_POLA_SHIFT;
545                 if (pola == MADT_INT_POLA_RSVD) {
546                         kprintf("ACPI MADT: warning invalid intsrc irq %d "
547                                 "pola, reserved\n", intsrc_ent->mint_src);
548                 } else if (pola == MADT_INT_POLA_LOW) {
549                         MADT_VPRINTF("warning invalid intsrc irq %d "
550                             "pola, low\n", intsrc_ent->mint_src);
551                 }
552         } else if (ent->me_type == MADT_ENT_IOAPIC) {
553                 const struct acpi_madt_ioapic *ioapic_ent;
554
555                 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
556                 if (ioapic_ent->mio_addr == 0) {
557                         kprintf("madt_ioapic_probe: zero IOAPIC address\n");
558                         return EINVAL;
559                 }
560                 if (ioapic_ent->mio_apic_id == APICID_MAX) {
561                         kprintf("madt_ioapic_probe: "
562                             "invalid IOAPIC apic id %d\n",
563                             ioapic_ent->mio_apic_id);
564                         return EINVAL;
565                 }
566
567                 arg->ioapic_cnt++;
568                 if (ioapic_ent->mio_gsi_base == 0)
569                         arg->gsi_base0 = 1;
570         }
571         return 0;
572 }
573
574 static int
575 madt_ioapic_probe(struct ioapic_enumerator *e)
576 {
577         struct madt_ioapic_probe_cbarg arg;
578         struct acpi_madt *madt;
579         int error;
580
581         if (madt_phyaddr == 0)
582                 return ENXIO;
583
584         madt = sdt_sdth_map(madt_phyaddr);
585         KKASSERT(madt != NULL);
586
587         bzero(&arg, sizeof(arg));
588
589         error = madt_iterate_entries(madt, madt_ioapic_probe_callback, &arg);
590         if (!error) {
591                 if (arg.ioapic_cnt == 0) {
592                         kprintf("madt_ioapic_probe: no IOAPIC\n");
593                         error = ENXIO;
594                 }
595                 if (!arg.gsi_base0) {
596                         kprintf("madt_ioapic_probe: no GSI base 0\n");
597                         error = EINVAL;
598                 }
599         }
600
601         sdt_sdth_unmap(&madt->madt_hdr);
602         return error;
603 }
604
605 static int
606 madt_ioapic_enum_callback(void *xarg, const struct acpi_madt_ent *ent)
607 {
608         if (ent->me_type == MADT_ENT_INTSRC) {
609                 const struct acpi_madt_intsrc *intsrc_ent;
610                 enum intr_trigger trig;
611                 enum intr_polarity pola;
612                 int ent_trig, ent_pola;
613
614                 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
615
616                 KKASSERT(intsrc_ent->mint_src < ISA_IRQ_CNT);
617                 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA)
618                         return 0;
619
620                 ent_trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
621                     MADT_INT_TRIG_SHIFT;
622                 if (ent_trig == MADT_INT_TRIG_RSVD)
623                         return 0;
624                 else if (ent_trig == MADT_INT_TRIG_LEVEL)
625                         trig = INTR_TRIGGER_LEVEL;
626                 else
627                         trig = INTR_TRIGGER_EDGE;
628
629                 ent_pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
630                     MADT_INT_POLA_SHIFT;
631                 if (ent_pola == MADT_INT_POLA_RSVD)
632                         return 0;
633                 else if (ent_pola == MADT_INT_POLA_LOW)
634                         pola = INTR_POLARITY_LOW;
635                 else
636                         pola = INTR_POLARITY_HIGH;
637
638                 if (intsrc_ent->mint_src == acpi_sci_irqno()) {
639                         acpi_sci_setmode1(trig, pola);
640                         MADT_VPRINTF("SCI irq %d, first test %s/%s\n",
641                             intsrc_ent->mint_src,
642                             intr_str_trigger(trig), intr_str_polarity(pola));
643                 }
644
645                 /*
646                  * We ignore the polarity and trigger changes, since
647                  * most of them are wrong or useless at best.
648                  */
649                 if (intsrc_ent->mint_src == intsrc_ent->mint_gsi) {
650                         /* Nothing changed */
651                         return 0;
652                 }
653                 trig = INTR_TRIGGER_EDGE;
654                 pola = INTR_POLARITY_HIGH;
655
656                 MADT_VPRINTF("INTSRC irq %d -> gsi %u %s/%s\n",
657                              intsrc_ent->mint_src, intsrc_ent->mint_gsi,
658                              intr_str_trigger(trig), intr_str_polarity(pola));
659                 ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi,
660                               trig, pola);
661         } else if (ent->me_type == MADT_ENT_IOAPIC) {
662                 const struct acpi_madt_ioapic *ioapic_ent;
663                 uint32_t ver;
664                 void *addr;
665                 int npin;
666
667                 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
668                 MADT_VPRINTF("IOAPIC addr 0x%08x, apic id %d, gsi base %u\n",
669                              ioapic_ent->mio_addr, ioapic_ent->mio_apic_id,
670                              ioapic_ent->mio_gsi_base);
671
672                 addr = ioapic_map(ioapic_ent->mio_addr);
673
674                 ver = ioapic_read(addr, IOAPIC_VER);
675                 npin = ((ver & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) + 1;
676
677                 ioapic_add(addr, ioapic_ent->mio_gsi_base, npin);
678         }
679         return 0;
680 }
681
682 static void
683 madt_ioapic_enumerate(struct ioapic_enumerator *e)
684 {
685         struct acpi_madt *madt;
686         int error;
687
688         KKASSERT(madt_phyaddr != 0);
689
690         madt = sdt_sdth_map(madt_phyaddr);
691         KKASSERT(madt != NULL);
692
693         error = madt_iterate_entries(madt, madt_ioapic_enum_callback, NULL);
694         if (error)
695                 panic("madt_ioapic_enumerate failed");
696
697         sdt_sdth_unmap(&madt->madt_hdr);
698 }
699
700 static struct ioapic_enumerator madt_ioapic_enumerator = {
701         .ioapic_prio = IOAPIC_ENUM_PRIO_MADT,
702         .ioapic_probe = madt_ioapic_probe,
703         .ioapic_enumerate = madt_ioapic_enumerate
704 };
705
706 static void
707 madt_ioapic_enum_register(void)
708 {
709         int prio;
710
711         prio = IOAPIC_ENUM_PRIO_MADT;
712         kgetenv_int("hw.madt_ioapic_prio", &prio);
713         madt_ioapic_enumerator.ioapic_prio = prio;
714
715         ioapic_enumerator_register(&madt_ioapic_enumerator);
716 }
717 SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY,
718         madt_ioapic_enum_register, 0);