2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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
35 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/systm.h>
40 #include <machine/pmap.h>
41 #include <machine/smp.h>
42 #include <machine/md_var.h>
43 #include <machine/specialreg.h>
44 #include <machine_base/apic/mpapic.h>
46 #define MADT_VPRINTF(fmt, arg...) \
49 kprintf("ACPI MADT: " fmt , ##arg); \
52 #define ACPI_RSDP_EBDA_MAPSZ 1024
53 #define ACPI_RSDP_BIOS_MAPSZ 0x20000
54 #define ACPI_RSDP_BIOS_MAPADDR 0xe0000
56 #define ACPI_RSDP_ALIGN 16
58 #define ACPI_RSDP_SIGLEN 8
59 #define ACPI_RSDP_SIG "RSD PTR "
61 #define ACPI_SDTH_SIGLEN 4
62 #define ACPI_RSDT_SIG "RSDT"
63 #define ACPI_XSDT_SIG "XSDT"
64 #define ACPI_MADT_SIG "APIC"
66 /* Root System Description Pointer */
68 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
70 uint8_t rsdp_oem_id[6];
75 uint8_t rsdp_ext_cksum;
79 /* System Description Table Header */
81 uint8_t sdth_sig[ACPI_SDTH_SIGLEN];
85 uint8_t sdth_oem_id[6];
86 uint8_t sdth_oem_tbid[8];
87 uint32_t sdth_oem_rev;
89 uint32_t sdth_crt_rev;
92 /* Extended System Description Table */
94 struct acpi_sdth xsdt_hdr;
95 uint64_t xsdt_ents[1];
98 /* Root System Description Table */
100 struct acpi_sdth rsdt_hdr;
101 uint32_t rsdt_ents[1];
104 /* Multiple APIC Description Table */
106 struct acpi_sdth madt_hdr;
107 uint32_t madt_lapic_addr;
109 uint8_t madt_ents[1];
112 /* Common parts of MADT APIC structure */
113 struct acpi_madt_ent {
114 uint8_t me_type; /* MADT_ENT_ */
118 #define MADT_ENT_LAPIC 0
119 #define MADT_ENT_IOAPIC 1
120 #define MADT_ENT_INTSRC 2
121 #define MADT_ENT_LAPIC_ADDR 5
123 /* MADT Processor Local APIC */
124 struct acpi_madt_lapic {
125 struct acpi_madt_ent ml_hdr;
128 uint32_t ml_flags; /* MADT_LAPIC_ */
131 #define MADT_LAPIC_ENABLED 0x1
134 struct acpi_madt_ioapic {
135 struct acpi_madt_ent mio_hdr;
137 uint8_t mio_reserved;
139 uint32_t mio_gsi_base;
142 /* MADT Interrupt Source Override */
143 struct acpi_madt_intsrc {
144 struct acpi_madt_ent mint_hdr;
145 uint8_t mint_bus; /* MADT_INT_BUS_ */
148 uint16_t mint_flags; /* MADT_INT_ */
151 #define MADT_INT_BUS_ISA 0
153 #define MADT_INT_POLA_MASK 0x3
154 #define MADT_INT_POLA_SHIFT 0
155 #define MADT_INT_POLA_CONFORM 0
156 #define MADT_INT_POLA_HIGH 1
157 #define MADT_INT_POLA_RSVD 2
158 #define MADT_INT_POLA_LOW 3
159 #define MADT_INT_TRIG_MASK 0xc
160 #define MADT_INT_TRIG_SHIFT 2
161 #define MADT_INT_TRIG_CONFORM 0
162 #define MADT_INT_TRIG_EDGE 1
163 #define MADT_INT_TRIG_RSVD 2
164 #define MADT_INT_TRIG_LEVEL 3
166 /* MADT Local APIC Address Override */
167 struct acpi_madt_lapic_addr {
168 struct acpi_madt_ent mla_hdr;
169 uint16_t mla_reserved;
170 uint64_t mla_lapic_addr;
173 typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
174 typedef int (*madt_iter_t)(void *,
175 const struct acpi_madt_ent *);
177 static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
178 static void *madt_sdth_map(vm_paddr_t);
179 static void madt_sdth_unmap(struct acpi_sdth *);
180 static vm_paddr_t madt_search_xsdt(vm_paddr_t);
181 static vm_paddr_t madt_search_rsdt(vm_paddr_t);
182 static int madt_check(vm_paddr_t);
183 static int madt_iterate_entries(struct acpi_madt *,
184 madt_iter_t, void *);
186 static vm_offset_t madt_lapic_pass1(void);
187 static int madt_lapic_pass2(int);
189 static void madt_lapic_enumerate(struct lapic_enumerator *);
190 static int madt_lapic_probe(struct lapic_enumerator *);
192 static void madt_ioapic_enumerate(
193 struct ioapic_enumerator *);
194 static int madt_ioapic_probe(struct ioapic_enumerator *);
196 extern u_long ebda_addr;
198 static vm_paddr_t madt_phyaddr;
203 const struct acpi_rsdp *rsdp;
204 madt_search_t search;
205 vm_paddr_t search_paddr, madt_paddr;
209 KKASSERT(madt_phyaddr == 0);
211 if (ebda_addr != 0) {
212 mapsz = ACPI_RSDP_EBDA_MAPSZ;
213 ptr = pmap_mapdev(ebda_addr, mapsz);
215 rsdp = madt_rsdp_search(ptr, mapsz);
217 MADT_VPRINTF("RSDP not in EBDA\n");
218 pmap_unmapdev((vm_offset_t)ptr, mapsz);
223 MADT_VPRINTF("RSDP in EBDA\n");
228 mapsz = ACPI_RSDP_BIOS_MAPSZ;
229 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
231 rsdp = madt_rsdp_search(ptr, mapsz);
233 kprintf("madt_probe: no RSDP\n");
234 pmap_unmapdev((vm_offset_t)ptr, mapsz);
237 MADT_VPRINTF("RSDP in BIOS mem\n");
241 if (rsdp->rsdp_rev != 2) {
242 search_paddr = rsdp->rsdp_rsdt;
243 search = madt_search_rsdt;
245 search_paddr = rsdp->rsdp_xsdt;
246 search = madt_search_xsdt;
248 pmap_unmapdev((vm_offset_t)ptr, mapsz);
250 madt_paddr = search(search_paddr);
251 if (madt_paddr == 0) {
252 kprintf("madt_probe: can't locate MADT\n");
256 /* Preliminary checks */
257 if (madt_check(madt_paddr)) {
258 kprintf("madt_probe: madt_check failed\n");
262 madt_phyaddr = madt_paddr;
264 SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_FIRST, madt_probe, 0);
266 static const struct acpi_rsdp *
267 madt_rsdp_search(const uint8_t *target, int size)
269 const struct acpi_rsdp *rsdp;
272 KKASSERT(size > sizeof(*rsdp));
274 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
275 rsdp = (const struct acpi_rsdp *)&target[i];
276 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
277 ACPI_RSDP_SIGLEN) == 0)
284 madt_sdth_map(vm_paddr_t paddr)
286 struct acpi_sdth *sdth;
289 sdth = pmap_mapdev(paddr, sizeof(*sdth));
290 mapsz = sdth->sdth_len;
291 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
293 if (mapsz < sizeof(*sdth))
296 return pmap_mapdev(paddr, mapsz);
300 madt_sdth_unmap(struct acpi_sdth *sdth)
302 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
306 madt_search_xsdt(vm_paddr_t xsdt_paddr)
308 struct acpi_xsdt *xsdt;
309 vm_paddr_t madt_paddr = 0;
312 if (xsdt_paddr == 0) {
313 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
317 xsdt = madt_sdth_map(xsdt_paddr);
319 kprintf("madt_search_xsdt: can't map XSDT\n");
323 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
324 ACPI_SDTH_SIGLEN) != 0) {
325 kprintf("madt_search_xsdt: not XSDT\n");
329 if (xsdt->xsdt_hdr.sdth_rev != 1) {
330 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
331 xsdt->xsdt_hdr.sdth_rev);
335 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
336 sizeof(xsdt->xsdt_ents[0]);
337 for (i = 0; i < nent; ++i) {
338 struct acpi_sdth *sdth;
340 if (xsdt->xsdt_ents[i] == 0)
343 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
347 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
349 madt_sdth_unmap(sdth);
352 MADT_VPRINTF("MADT in XSDT\n");
353 madt_paddr = xsdt->xsdt_ents[i];
359 madt_sdth_unmap(&xsdt->xsdt_hdr);
364 madt_search_rsdt(vm_paddr_t rsdt_paddr)
366 struct acpi_rsdt *rsdt;
367 vm_paddr_t madt_paddr = 0;
370 if (rsdt_paddr == 0) {
371 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
375 rsdt = madt_sdth_map(rsdt_paddr);
377 kprintf("madt_search_rsdt: can't map RSDT\n");
381 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
382 ACPI_SDTH_SIGLEN) != 0) {
383 kprintf("madt_search_rsdt: not RSDT\n");
387 if (rsdt->rsdt_hdr.sdth_rev != 1) {
388 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
389 rsdt->rsdt_hdr.sdth_rev);
393 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
394 sizeof(rsdt->rsdt_ents[0]);
395 for (i = 0; i < nent; ++i) {
396 struct acpi_sdth *sdth;
398 if (rsdt->rsdt_ents[i] == 0)
401 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
405 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
407 madt_sdth_unmap(sdth);
410 MADT_VPRINTF("MADT in RSDT\n");
411 madt_paddr = rsdt->rsdt_ents[i];
417 madt_sdth_unmap(&rsdt->rsdt_hdr);
422 madt_check(vm_paddr_t madt_paddr)
424 struct acpi_madt *madt;
427 KKASSERT(madt_paddr != 0);
429 madt = madt_sdth_map(madt_paddr);
430 KKASSERT(madt != NULL);
433 * MADT in ACPI specification 1.0 - 4.0
435 if (madt->madt_hdr.sdth_rev < 1 || madt->madt_hdr.sdth_rev > 3) {
436 kprintf("madt_check: unsupported MADT revision %d\n",
437 madt->madt_hdr.sdth_rev);
442 if (madt->madt_hdr.sdth_len <
443 sizeof(*madt) - sizeof(madt->madt_ents)) {
444 kprintf("madt_check: invalid MADT length %u\n",
445 madt->madt_hdr.sdth_len);
450 madt_sdth_unmap(&madt->madt_hdr);
455 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
457 int size, cur, error;
459 size = madt->madt_hdr.sdth_len -
460 (sizeof(*madt) - sizeof(madt->madt_ents));
464 while (size - cur > sizeof(struct acpi_madt_ent)) {
465 const struct acpi_madt_ent *ent;
467 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
468 if (ent->me_len < sizeof(*ent)) {
469 kprintf("madt_iterate_entries: invalid MADT "
470 "entry len %d\n", ent->me_len);
474 if (ent->me_len > (size - cur)) {
475 kprintf("madt_iterate_entries: invalid MADT "
476 "entry len %d, > table length\n", ent->me_len);
484 * Only Local APIC, I/O APIC and Interrupt Source Override
485 * are defined in ACPI specification 1.0 - 4.0
487 switch (ent->me_type) {
489 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
490 kprintf("madt_iterate_entries: invalid MADT "
491 "lapic entry len %d\n", ent->me_len);
496 case MADT_ENT_IOAPIC:
497 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
498 kprintf("madt_iterate_entries: invalid MADT "
499 "ioapic entry len %d\n", ent->me_len);
504 case MADT_ENT_INTSRC:
505 if (ent->me_len < sizeof(struct acpi_madt_intsrc)) {
506 kprintf("madt_iterate_entries: invalid MADT "
507 "intsrc entry len %d\n",
516 error = func(arg, ent);
524 madt_lapic_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
526 const struct acpi_madt_lapic_addr *lapic_addr_ent;
527 uint64_t *addr64 = xarg;
529 if (ent->me_type != MADT_ENT_LAPIC_ADDR)
531 if (ent->me_len < sizeof(*lapic_addr_ent)) {
532 kprintf("madt_lapic_pass1: "
533 "invalid LAPIC address override length\n");
536 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
538 *addr64 = lapic_addr_ent->mla_lapic_addr;
543 madt_lapic_pass1(void)
545 struct acpi_madt *madt;
546 vm_offset_t lapic_addr;
547 uint64_t lapic_addr64;
550 KKASSERT(madt_phyaddr != 0);
552 madt = madt_sdth_map(madt_phyaddr);
553 KKASSERT(madt != NULL);
555 MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
556 madt->madt_lapic_addr, madt->madt_flags);
557 lapic_addr = madt->madt_lapic_addr;
560 error = madt_iterate_entries(madt, madt_lapic_pass1_callback,
563 panic("madt_iterate_entries(pass1) failed\n");
565 if (lapic_addr64 != 0) {
566 kprintf("ACPI MADT: warning 64bits lapic address 0x%llx\n",
568 /* XXX vm_offset_t is 32bits on i386 */
569 lapic_addr = lapic_addr64;
572 madt_sdth_unmap(&madt->madt_hdr);
577 struct madt_lapic_pass2_cbarg {
584 madt_lapic_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
586 const struct acpi_madt_lapic *lapic_ent;
587 struct madt_lapic_pass2_cbarg *arg = xarg;
589 if (ent->me_type != MADT_ENT_LAPIC)
592 lapic_ent = (const struct acpi_madt_lapic *)ent;
593 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
594 MADT_VPRINTF("cpu id %d, apic id %d\n",
595 lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
596 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
597 mp_set_cpuids(0, lapic_ent->ml_apic_id);
600 mp_set_cpuids(arg->cpu, lapic_ent->ml_apic_id);
608 madt_lapic_pass2(int bsp_apic_id)
610 struct acpi_madt *madt;
611 struct madt_lapic_pass2_cbarg arg;
614 MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
616 KKASSERT(madt_phyaddr != 0);
618 madt = madt_sdth_map(madt_phyaddr);
619 KKASSERT(madt != NULL);
621 bzero(&arg, sizeof(arg));
623 arg.bsp_apic_id = bsp_apic_id;
625 error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg);
627 panic("madt_iterate_entries(pass2) failed\n");
629 KKASSERT(arg.bsp_found);
630 KKASSERT(arg.cpu > 1);
631 mp_naps = arg.cpu - 1; /* exclude BSP */
633 madt_sdth_unmap(&madt->madt_hdr);
638 struct madt_lapic_probe_cbarg {
640 vm_offset_t lapic_addr;
644 madt_lapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
646 struct madt_lapic_probe_cbarg *arg = xarg;
648 if (ent->me_type == MADT_ENT_LAPIC) {
649 const struct acpi_madt_lapic *lapic_ent;
651 lapic_ent = (const struct acpi_madt_lapic *)ent;
652 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
654 } else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
655 const struct acpi_madt_lapic_addr *lapic_addr_ent;
657 if (ent->me_len < sizeof(*lapic_addr_ent)) {
658 kprintf("madt_lapic_probe: "
659 "invalid LAPIC address override length\n");
662 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
664 if (lapic_addr_ent->mla_lapic_addr != 0)
665 arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
671 madt_lapic_probe(struct lapic_enumerator *e)
673 struct madt_lapic_probe_cbarg arg;
674 struct acpi_madt *madt;
677 if (madt_phyaddr == 0)
680 madt = madt_sdth_map(madt_phyaddr);
681 KKASSERT(madt != NULL);
683 bzero(&arg, sizeof(arg));
684 arg.lapic_addr = madt->madt_lapic_addr;
686 error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
688 if (arg.cpu_count <= 1) {
689 kprintf("madt_lapic_probe: "
690 "less than 2 CPUs is found\n");
693 if (arg.lapic_addr == 0) {
694 kprintf("madt_lapic_probe: zero LAPIC address\n");
699 madt_sdth_unmap(&madt->madt_hdr);
704 madt_lapic_enumerate(struct lapic_enumerator *e)
706 vm_offset_t lapic_addr;
709 KKASSERT(madt_phyaddr != 0);
711 lapic_addr = madt_lapic_pass1();
713 panic("madt_lapic_enumerate: no local apic\n");
715 lapic_map(lapic_addr);
717 bsp_apic_id = APIC_ID(lapic.id);
718 if (madt_lapic_pass2(bsp_apic_id))
719 panic("madt_lapic_enumerate: madt_lapic_pass2 failed\n");
722 static struct lapic_enumerator madt_lapic_enumerator = {
723 .lapic_prio = LAPIC_ENUM_PRIO_MADT,
724 .lapic_probe = madt_lapic_probe,
725 .lapic_enumerate = madt_lapic_enumerate
729 madt_lapic_enum_register(void)
733 prio = LAPIC_ENUM_PRIO_MADT;
734 kgetenv_int("hw.madt_lapic_prio", &prio);
735 madt_lapic_enumerator.lapic_prio = prio;
737 lapic_enumerator_register(&madt_lapic_enumerator);
739 SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0);
741 struct madt_ioapic_probe_cbarg {
747 madt_ioapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
749 struct madt_ioapic_probe_cbarg *arg = xarg;
751 if (ent->me_type == MADT_ENT_INTSRC) {
752 const struct acpi_madt_intsrc *intsrc_ent;
755 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
757 /* XXX magic number */
758 if (intsrc_ent->mint_src >= 16) {
759 kprintf("madt_ioapic_probe: invalid intsrc irq (%d)\n",
760 intsrc_ent->mint_src);
764 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) {
765 kprintf("ACPI MADT: warning intsrc irq %d "
766 "bus is not ISA (%d)\n",
767 intsrc_ent->mint_src, intsrc_ent->mint_bus);
770 trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
772 if (trig == MADT_INT_TRIG_RSVD) {
773 kprintf("ACPI MADT: warning invalid intsrc irq %d "
774 "trig (%d)\n", intsrc_ent->mint_src, trig);
777 pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
779 if (pola == MADT_INT_POLA_RSVD) {
780 kprintf("ACPI MADT: warning invalid intsrc irq %d "
781 "pola (%d)\n", intsrc_ent->mint_src, pola);
783 } else if (ent->me_type == MADT_ENT_IOAPIC) {
784 const struct acpi_madt_ioapic *ioapic_ent;
786 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
787 if (ioapic_ent->mio_addr == 0) {
788 kprintf("madt_ioapic_probe: zero IOAPIC address\n");
793 if (ioapic_ent->mio_gsi_base == 0)
800 madt_ioapic_probe(struct ioapic_enumerator *e)
802 struct madt_ioapic_probe_cbarg arg;
803 struct acpi_madt *madt;
806 if (madt_phyaddr == 0)
809 madt = madt_sdth_map(madt_phyaddr);
810 KKASSERT(madt != NULL);
812 bzero(&arg, sizeof(arg));
814 error = madt_iterate_entries(madt, madt_ioapic_probe_callback, &arg);
816 if (arg.ioapic_cnt == 0) {
817 kprintf("madt_ioapic_probe: no IOAPIC\n");
820 if (!arg.gsi_base0) {
821 kprintf("madt_ioapic_probe: no GSI base 0\n");
826 madt_sdth_unmap(&madt->madt_hdr);
831 madt_ioapic_enum_callback(void *xarg, const struct acpi_madt_ent *ent)
833 if (ent->me_type == MADT_ENT_INTSRC) {
834 const struct acpi_madt_intsrc *intsrc_ent;
835 enum intr_trigger trig;
836 enum intr_polarity pola;
839 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
841 KKASSERT(intsrc_ent->mint_src < 16);
842 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA)
845 ent_trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
847 if (ent_trig == MADT_INT_TRIG_RSVD) {
850 } else if (ent_trig == MADT_INT_TRIG_LEVEL) {
851 trig = INTR_TRIGGER_LEVEL;
852 pola = INTR_POLARITY_LOW;
855 trig = INTR_TRIGGER_EDGE;
856 pola = INTR_POLARITY_HIGH;
859 if (intsrc_ent->mint_src == intsrc_ent->mint_gsi &&
860 trig == INTR_TRIGGER_EDGE) {
861 /* Nothing changed */
865 MADT_VPRINTF("INTSRC irq %d -> gsi %u %c\n",
866 intsrc_ent->mint_src, intsrc_ent->mint_gsi,
867 trig == INTR_TRIGGER_EDGE ? 'E' : 'L');
868 ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi,
870 } else if (ent->me_type == MADT_ENT_IOAPIC) {
871 const struct acpi_madt_ioapic *ioapic_ent;
873 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
874 MADT_VPRINTF("IOAPIC addr 0x%08x, apic id %d, gsi base %u\n",
875 ioapic_ent->mio_addr, ioapic_ent->mio_apic_id,
876 ioapic_ent->mio_gsi_base);
878 if (!ioapic_use_old) {
883 addr = ioapic_map(ioapic_ent->mio_addr);
885 ver = ioapic_read(addr, IOAPIC_VER);
886 npin = ((ver & IOART_VER_MAXREDIR) >>
889 ioapic_add(addr, ioapic_ent->mio_gsi_base, npin);
896 madt_ioapic_enumerate(struct ioapic_enumerator *e)
898 struct acpi_madt *madt;
901 KKASSERT(madt_phyaddr != 0);
903 madt = madt_sdth_map(madt_phyaddr);
904 KKASSERT(madt != NULL);
906 error = madt_iterate_entries(madt, madt_ioapic_enum_callback, NULL);
908 panic("madt_ioapic_enumerate failed\n");
910 madt_sdth_unmap(&madt->madt_hdr);
913 static struct ioapic_enumerator madt_ioapic_enumerator = {
914 .ioapic_prio = IOAPIC_ENUM_PRIO_MADT,
915 .ioapic_probe = madt_ioapic_probe,
916 .ioapic_enumerate = madt_ioapic_enumerate
920 madt_ioapic_enum_register(void)
924 prio = IOAPIC_ENUM_PRIO_MADT;
925 kgetenv_int("hw.madt_ioapic_prio", &prio);
926 madt_ioapic_enumerator.ioapic_prio = prio;
928 ioapic_enumerator_register(&madt_ioapic_enumerator);
930 SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY,
931 madt_ioapic_enum_register, 0);