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>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
39 #include <machine/pmap.h>
40 #include <machine/smp.h>
41 #include <machine/md_var.h>
42 #include <machine/specialreg.h>
43 #include <machine_base/apic/mpapic.h>
45 #define MADT_VPRINTF(fmt, arg...) \
48 kprintf("ACPI MADT: " fmt , ##arg); \
51 #define ACPI_RSDP_EBDA_MAPSZ 1024
52 #define ACPI_RSDP_BIOS_MAPSZ 0x20000
53 #define ACPI_RSDP_BIOS_MAPADDR 0xe0000
55 #define ACPI_RSDP_ALIGN 16
57 #define ACPI_RSDP_SIGLEN 8
58 #define ACPI_RSDP_SIG "RSD PTR "
60 #define ACPI_SDTH_SIGLEN 4
61 #define ACPI_RSDT_SIG "RSDT"
62 #define ACPI_XSDT_SIG "XSDT"
63 #define ACPI_MADT_SIG "APIC"
65 /* Root System Description Pointer */
67 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
69 uint8_t rsdp_oem_id[6];
74 uint8_t rsdp_ext_cksum;
78 /* System Description Table Header */
80 uint8_t sdth_sig[ACPI_SDTH_SIGLEN];
84 uint8_t sdth_oem_id[6];
85 uint8_t sdth_oem_tbid[8];
86 uint32_t sdth_oem_rev;
88 uint32_t sdth_crt_rev;
91 /* Extended System Description Table */
93 struct acpi_sdth xsdt_hdr;
94 uint64_t xsdt_ents[1];
97 /* Root System Description Table */
99 struct acpi_sdth rsdt_hdr;
100 uint32_t rsdt_ents[1];
103 /* Multiple APIC Description Table */
105 struct acpi_sdth madt_hdr;
106 uint32_t madt_lapic_addr;
108 uint8_t madt_ents[1];
111 /* Common parts of MADT APIC structure */
112 struct acpi_madt_ent {
113 uint8_t me_type; /* MADT_ENT_ */
117 #define MADT_ENT_LAPIC 0
118 #define MADT_ENT_IOAPIC 1
119 #define MADT_ENT_INTSRC 2
120 #define MADT_ENT_LAPIC_ADDR 5
122 /* MADT Processor Local APIC */
123 struct acpi_madt_lapic {
124 struct acpi_madt_ent ml_hdr;
127 uint32_t ml_flags; /* MADT_LAPIC_ */
130 #define MADT_LAPIC_ENABLED 0x1
133 struct acpi_madt_ioapic {
134 struct acpi_madt_ent mio_hdr;
136 uint8_t mio_reserved;
138 uint32_t mio_gsi_base;
141 /* MADT Interrupt Source Override */
142 struct acpi_madt_intsrc {
143 struct acpi_madt_ent mint_hdr;
144 uint8_t mint_bus; /* MADT_INT_BUS_ */
147 uint16_t mint_flags; /* MADT_INT_ */
150 #define MADT_INT_BUS_ISA 0
152 #define MADT_INT_POLA_MASK 0x3
153 #define MADT_INT_POLA_SHIFT 0
154 #define MADT_INT_POLA_CONFORM 0
155 #define MADT_INT_POLA_HIGH 1
156 #define MADT_INT_POLA_RSVD 2
157 #define MADT_INT_POLA_LOW 3
158 #define MADT_INT_TRIG_MASK 0xc
159 #define MADT_INT_TRIG_SHIFT 2
160 #define MADT_INT_TRIG_CONFORM 0
161 #define MADT_INT_TRIG_EDGE 1
162 #define MADT_INT_TRIG_RSVD 2
163 #define MADT_INT_TRIG_LEVEL 3
165 /* MADT Local APIC Address Override */
166 struct acpi_madt_lapic_addr {
167 struct acpi_madt_ent mla_hdr;
168 uint16_t mla_reserved;
169 uint64_t mla_lapic_addr;
172 typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
173 typedef int (*madt_iter_t)(void *,
174 const struct acpi_madt_ent *);
176 static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
177 static void *madt_sdth_map(vm_paddr_t);
178 static void madt_sdth_unmap(struct acpi_sdth *);
179 static vm_paddr_t madt_search_xsdt(vm_paddr_t);
180 static vm_paddr_t madt_search_rsdt(vm_paddr_t);
181 static int madt_check(vm_paddr_t);
182 static int madt_iterate_entries(struct acpi_madt *,
183 madt_iter_t, void *);
185 static vm_offset_t madt_lapic_pass1(void);
186 static int madt_lapic_pass2(int);
188 static void madt_lapic_enumerate(struct lapic_enumerator *);
189 static int madt_lapic_probe(struct lapic_enumerator *);
191 static void madt_ioapic_enumerate(
192 struct ioapic_enumerator *);
193 static int madt_ioapic_probe(struct ioapic_enumerator *);
195 extern u_long ebda_addr;
197 static vm_paddr_t madt_phyaddr;
202 const struct acpi_rsdp *rsdp;
203 madt_search_t search;
204 vm_paddr_t search_paddr, madt_paddr;
208 KKASSERT(madt_phyaddr == 0);
210 if (ebda_addr != 0) {
211 mapsz = ACPI_RSDP_EBDA_MAPSZ;
212 ptr = pmap_mapdev(ebda_addr, mapsz);
214 rsdp = madt_rsdp_search(ptr, mapsz);
216 MADT_VPRINTF("RSDP not in EBDA\n");
217 pmap_unmapdev((vm_offset_t)ptr, mapsz);
222 MADT_VPRINTF("RSDP in EBDA\n");
227 mapsz = ACPI_RSDP_BIOS_MAPSZ;
228 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
230 rsdp = madt_rsdp_search(ptr, mapsz);
232 kprintf("madt_probe: no RSDP\n");
233 pmap_unmapdev((vm_offset_t)ptr, mapsz);
236 MADT_VPRINTF("RSDP in BIOS mem\n");
240 if (rsdp->rsdp_rev != 2) {
241 search_paddr = rsdp->rsdp_rsdt;
242 search = madt_search_rsdt;
244 search_paddr = rsdp->rsdp_xsdt;
245 search = madt_search_xsdt;
247 pmap_unmapdev((vm_offset_t)ptr, mapsz);
249 madt_paddr = search(search_paddr);
250 if (madt_paddr == 0) {
251 kprintf("madt_probe: can't locate MADT\n");
255 /* Preliminary checks */
256 if (madt_check(madt_paddr)) {
257 kprintf("madt_probe: madt_check failed\n");
261 madt_phyaddr = madt_paddr;
263 SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_FIRST, madt_probe, 0);
265 static const struct acpi_rsdp *
266 madt_rsdp_search(const uint8_t *target, int size)
268 const struct acpi_rsdp *rsdp;
271 KKASSERT(size > sizeof(*rsdp));
273 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
274 rsdp = (const struct acpi_rsdp *)&target[i];
275 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
276 ACPI_RSDP_SIGLEN) == 0)
283 madt_sdth_map(vm_paddr_t paddr)
285 struct acpi_sdth *sdth;
288 sdth = pmap_mapdev(paddr, sizeof(*sdth));
289 mapsz = sdth->sdth_len;
290 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
292 if (mapsz < sizeof(*sdth))
295 return pmap_mapdev(paddr, mapsz);
299 madt_sdth_unmap(struct acpi_sdth *sdth)
301 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
305 madt_search_xsdt(vm_paddr_t xsdt_paddr)
307 struct acpi_xsdt *xsdt;
308 vm_paddr_t madt_paddr = 0;
311 if (xsdt_paddr == 0) {
312 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
316 xsdt = madt_sdth_map(xsdt_paddr);
318 kprintf("madt_search_xsdt: can't map XSDT\n");
322 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
323 ACPI_SDTH_SIGLEN) != 0) {
324 kprintf("madt_search_xsdt: not XSDT\n");
328 if (xsdt->xsdt_hdr.sdth_rev != 1) {
329 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
330 xsdt->xsdt_hdr.sdth_rev);
334 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
335 sizeof(xsdt->xsdt_ents[0]);
336 for (i = 0; i < nent; ++i) {
337 struct acpi_sdth *sdth;
339 if (xsdt->xsdt_ents[i] == 0)
342 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
346 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
348 madt_sdth_unmap(sdth);
351 MADT_VPRINTF("MADT in XSDT\n");
352 madt_paddr = xsdt->xsdt_ents[i];
358 madt_sdth_unmap(&xsdt->xsdt_hdr);
363 madt_search_rsdt(vm_paddr_t rsdt_paddr)
365 struct acpi_rsdt *rsdt;
366 vm_paddr_t madt_paddr = 0;
369 if (rsdt_paddr == 0) {
370 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
374 rsdt = madt_sdth_map(rsdt_paddr);
376 kprintf("madt_search_rsdt: can't map RSDT\n");
380 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
381 ACPI_SDTH_SIGLEN) != 0) {
382 kprintf("madt_search_rsdt: not RSDT\n");
386 if (rsdt->rsdt_hdr.sdth_rev != 1) {
387 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
388 rsdt->rsdt_hdr.sdth_rev);
392 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
393 sizeof(rsdt->rsdt_ents[0]);
394 for (i = 0; i < nent; ++i) {
395 struct acpi_sdth *sdth;
397 if (rsdt->rsdt_ents[i] == 0)
400 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
404 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
406 madt_sdth_unmap(sdth);
409 MADT_VPRINTF("MADT in RSDT\n");
410 madt_paddr = rsdt->rsdt_ents[i];
416 madt_sdth_unmap(&rsdt->rsdt_hdr);
421 madt_check(vm_paddr_t madt_paddr)
423 struct acpi_madt *madt;
426 KKASSERT(madt_paddr != 0);
428 madt = madt_sdth_map(madt_paddr);
429 KKASSERT(madt != NULL);
432 * MADT in ACPI specification 1.0 - 4.0
434 if (madt->madt_hdr.sdth_rev < 1 || madt->madt_hdr.sdth_rev > 3) {
435 kprintf("madt_check: unsupported MADT revision %d\n",
436 madt->madt_hdr.sdth_rev);
441 if (madt->madt_hdr.sdth_len <
442 sizeof(*madt) - sizeof(madt->madt_ents)) {
443 kprintf("madt_check: invalid MADT length %u\n",
444 madt->madt_hdr.sdth_len);
449 madt_sdth_unmap(&madt->madt_hdr);
454 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
456 int size, cur, error;
458 size = madt->madt_hdr.sdth_len -
459 (sizeof(*madt) - sizeof(madt->madt_ents));
463 while (size - cur > sizeof(struct acpi_madt_ent)) {
464 const struct acpi_madt_ent *ent;
466 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
467 if (ent->me_len < sizeof(*ent)) {
468 kprintf("madt_iterate_entries: invalid MADT "
469 "entry len %d\n", ent->me_len);
473 if (ent->me_len > (size - cur)) {
474 kprintf("madt_iterate_entries: invalid MADT "
475 "entry len %d, > table length\n", ent->me_len);
483 * Only Local APIC, I/O APIC and Interrupt Source Override
484 * are defined in ACPI specification 1.0 - 4.0
486 switch (ent->me_type) {
488 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
489 kprintf("madt_iterate_entries: invalid MADT "
490 "lapic entry len %d\n", ent->me_len);
495 case MADT_ENT_IOAPIC:
496 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
497 kprintf("madt_iterate_entries: invalid MADT "
498 "ioapic entry len %d\n", ent->me_len);
503 case MADT_ENT_INTSRC:
504 if (ent->me_len < sizeof(struct acpi_madt_intsrc)) {
505 kprintf("madt_iterate_entries: invalid MADT "
506 "intsrc entry len %d\n",
515 error = func(arg, ent);
523 madt_lapic_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
525 const struct acpi_madt_lapic_addr *lapic_addr_ent;
526 uint64_t *addr64 = xarg;
528 if (ent->me_type != MADT_ENT_LAPIC_ADDR)
530 if (ent->me_len < sizeof(*lapic_addr_ent)) {
531 kprintf("madt_lapic_pass1: "
532 "invalid LAPIC address override length\n");
535 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
537 *addr64 = lapic_addr_ent->mla_lapic_addr;
542 madt_lapic_pass1(void)
544 struct acpi_madt *madt;
545 vm_offset_t lapic_addr;
546 uint64_t lapic_addr64;
549 KKASSERT(madt_phyaddr != 0);
551 madt = madt_sdth_map(madt_phyaddr);
552 KKASSERT(madt != NULL);
554 MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
555 madt->madt_lapic_addr, madt->madt_flags);
556 lapic_addr = madt->madt_lapic_addr;
559 error = madt_iterate_entries(madt, madt_lapic_pass1_callback,
562 panic("madt_iterate_entries(pass1) failed\n");
564 if (lapic_addr64 != 0) {
565 kprintf("ACPI MADT: 64bits lapic address 0x%lx\n",
567 lapic_addr = lapic_addr64;
570 madt_sdth_unmap(&madt->madt_hdr);
575 struct madt_lapic_pass2_cbarg {
582 madt_lapic_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
584 const struct acpi_madt_lapic *lapic_ent;
585 struct madt_lapic_pass2_cbarg *arg = xarg;
587 if (ent->me_type != MADT_ENT_LAPIC)
590 lapic_ent = (const struct acpi_madt_lapic *)ent;
591 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
592 MADT_VPRINTF("cpu id %d, apic id %d\n",
593 lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
594 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
595 mp_set_cpuids(0, lapic_ent->ml_apic_id);
598 mp_set_cpuids(arg->cpu, lapic_ent->ml_apic_id);
606 madt_lapic_pass2(int bsp_apic_id)
608 struct acpi_madt *madt;
609 struct madt_lapic_pass2_cbarg arg;
612 MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
614 KKASSERT(madt_phyaddr != 0);
616 madt = madt_sdth_map(madt_phyaddr);
617 KKASSERT(madt != NULL);
619 bzero(&arg, sizeof(arg));
621 arg.bsp_apic_id = bsp_apic_id;
623 error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg);
625 panic("madt_iterate_entries(pass2) failed\n");
627 KKASSERT(arg.bsp_found);
628 KKASSERT(arg.cpu > 1);
629 mp_naps = arg.cpu - 1; /* exclude BSP */
631 madt_sdth_unmap(&madt->madt_hdr);
636 struct madt_lapic_probe_cbarg {
638 vm_offset_t lapic_addr;
642 madt_lapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
644 struct madt_lapic_probe_cbarg *arg = xarg;
646 if (ent->me_type == MADT_ENT_LAPIC) {
647 const struct acpi_madt_lapic *lapic_ent;
649 lapic_ent = (const struct acpi_madt_lapic *)ent;
650 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
652 } else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
653 const struct acpi_madt_lapic_addr *lapic_addr_ent;
655 if (ent->me_len < sizeof(*lapic_addr_ent)) {
656 kprintf("madt_lapic_probe: "
657 "invalid LAPIC address override length\n");
660 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
662 if (lapic_addr_ent->mla_lapic_addr != 0)
663 arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
669 madt_lapic_probe(struct lapic_enumerator *e)
671 struct madt_lapic_probe_cbarg arg;
672 struct acpi_madt *madt;
675 if (madt_phyaddr == 0)
678 madt = madt_sdth_map(madt_phyaddr);
679 KKASSERT(madt != NULL);
681 bzero(&arg, sizeof(arg));
682 arg.lapic_addr = madt->madt_lapic_addr;
684 error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
686 if (arg.cpu_count <= 1) {
687 kprintf("madt_lapic_probe: "
688 "less than 2 CPUs is found\n");
691 if (arg.lapic_addr == 0) {
692 kprintf("madt_lapic_probe: zero LAPIC address\n");
697 madt_sdth_unmap(&madt->madt_hdr);
702 madt_lapic_enumerate(struct lapic_enumerator *e)
704 vm_offset_t lapic_addr;
707 KKASSERT(madt_phyaddr != 0);
709 lapic_addr = madt_lapic_pass1();
711 panic("madt_lapic_enumerate: no local apic\n");
713 lapic_map(lapic_addr);
715 bsp_apic_id = APIC_ID(lapic->id);
716 if (madt_lapic_pass2(bsp_apic_id))
717 panic("madt_lapic_enumerate: madt_lapic_pass2 failed\n");
720 static struct lapic_enumerator madt_lapic_enumerator = {
721 .lapic_prio = LAPIC_ENUM_PRIO_MADT,
722 .lapic_probe = madt_lapic_probe,
723 .lapic_enumerate = madt_lapic_enumerate
727 madt_lapic_enum_register(void)
731 prio = LAPIC_ENUM_PRIO_MADT;
732 kgetenv_int("hw.madt_lapic_prio", &prio);
733 madt_lapic_enumerator.lapic_prio = prio;
735 lapic_enumerator_register(&madt_lapic_enumerator);
737 SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0);
739 struct madt_ioapic_probe_cbarg {
745 madt_ioapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
747 struct madt_ioapic_probe_cbarg *arg = xarg;
749 if (ent->me_type == MADT_ENT_INTSRC) {
750 const struct acpi_madt_intsrc *intsrc_ent;
753 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
755 /* XXX magic number */
756 if (intsrc_ent->mint_src >= 16) {
757 kprintf("madt_ioapic_probe: invalid intsrc irq (%d)\n",
758 intsrc_ent->mint_src);
762 if (intsrc_ent->mint_src == intsrc_ent->mint_gsi) {
763 kprintf("ACPI MADT: warning intsrc irq %d "
764 "no gsi change\n", intsrc_ent->mint_src);
767 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) {
768 kprintf("ACPI MADT: warning intsrc irq %d "
769 "bus is not ISA (%d)\n",
770 intsrc_ent->mint_src, intsrc_ent->mint_bus);
773 trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
775 if (trig != MADT_INT_TRIG_EDGE &&
776 trig != MADT_INT_TRIG_CONFORM) {
777 kprintf("ACPI MADT: warning invalid intsrc irq %d "
778 "trig (%d)\n", intsrc_ent->mint_src, trig);
781 pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
783 if (pola != MADT_INT_POLA_HIGH &&
784 pola != MADT_INT_POLA_CONFORM) {
785 kprintf("ACPI MADT: warning invalid intsrc irq %d "
786 "pola (%d)\n", intsrc_ent->mint_src, pola);
788 } else if (ent->me_type == MADT_ENT_IOAPIC) {
789 const struct acpi_madt_ioapic *ioapic_ent;
791 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
792 if (ioapic_ent->mio_addr == 0) {
793 kprintf("madt_ioapic_probe: zero IOAPIC address\n");
798 if (ioapic_ent->mio_gsi_base == 0)
805 madt_ioapic_probe(struct ioapic_enumerator *e)
807 struct madt_ioapic_probe_cbarg arg;
808 struct acpi_madt *madt;
811 if (madt_phyaddr == 0)
814 madt = madt_sdth_map(madt_phyaddr);
815 KKASSERT(madt != NULL);
817 bzero(&arg, sizeof(arg));
819 error = madt_iterate_entries(madt, madt_ioapic_probe_callback, &arg);
821 if (arg.ioapic_cnt == 0) {
822 kprintf("madt_ioapic_probe: no IOAPIC\n");
825 if (!arg.gsi_base0) {
826 kprintf("madt_ioapic_probe: no GSI base 0\n");
831 madt_sdth_unmap(&madt->madt_hdr);
836 madt_ioapic_enum_callback(void *xarg, const struct acpi_madt_ent *ent)
838 if (ent->me_type == MADT_ENT_INTSRC) {
839 const struct acpi_madt_intsrc *intsrc_ent;
841 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
842 if (intsrc_ent->mint_src == intsrc_ent->mint_gsi ||
843 intsrc_ent->mint_bus != MADT_INT_BUS_ISA)
846 MADT_VPRINTF("INTSRC irq %d -> gsi %u\n",
847 intsrc_ent->mint_src, intsrc_ent->mint_gsi);
848 ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi);
849 } else if (ent->me_type == MADT_ENT_IOAPIC) {
850 const struct acpi_madt_ioapic *ioapic_ent;
852 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
853 MADT_VPRINTF("IOAPIC addr 0x%08x, apic id %d, gsi base %u\n",
854 ioapic_ent->mio_addr, ioapic_ent->mio_apic_id,
855 ioapic_ent->mio_gsi_base);
857 if (!ioapic_use_old) {
862 addr = ioapic_map(ioapic_ent->mio_addr);
864 ver = ioapic_read(addr, IOAPIC_VER);
865 npin = ((ver & IOART_VER_MAXREDIR) >>
868 ioapic_add(addr, ioapic_ent->mio_gsi_base, npin);
875 madt_ioapic_enumerate(struct ioapic_enumerator *e)
877 struct acpi_madt *madt;
880 KKASSERT(madt_phyaddr != 0);
882 madt = madt_sdth_map(madt_phyaddr);
883 KKASSERT(madt != NULL);
885 error = madt_iterate_entries(madt, madt_ioapic_enum_callback, NULL);
887 panic("madt_ioapic_enumerate failed\n");
889 madt_sdth_unmap(&madt->madt_hdr);
892 static struct ioapic_enumerator madt_ioapic_enumerator = {
893 .ioapic_prio = IOAPIC_ENUM_PRIO_MADT,
894 .ioapic_probe = madt_ioapic_probe,
895 .ioapic_enumerate = madt_ioapic_enumerate
899 madt_ioapic_enum_register(void)
903 prio = IOAPIC_ENUM_PRIO_MADT;
904 kgetenv_int("hw.madt_ioapic_prio", &prio);
905 madt_ioapic_enumerator.ioapic_prio = prio;
907 ioapic_enumerator_register(&madt_ioapic_enumerator);
909 SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY,
910 madt_ioapic_enum_register, 0);