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_OVR 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_ovr {
143 struct acpi_madt_ent miso_hdr;
147 uint16_t miso_flags; /* MADT_ISO_ */
150 #define MADT_ISO_POLA_MASK 0x3
151 #define MADT_ISO_POLA_SHIFT 0
152 #define MADT_ISO_POLA_CONFORM 0
153 #define MADT_ISO_POLA_HIGH 1
154 #define MADT_ISO_POLA_RSVD 2
155 #define MADT_ISO_POLA_LOW 3
156 #define MADT_ISO_TRIG_MASK 0xc
157 #define MADT_ISO_TRIG_SHIFT 2
158 #define MADT_ISO_TRIG_CONFORM 0
159 #define MADT_ISO_TRIG_EDGE 1
160 #define MADT_ISO_TRIG_RSVD 2
161 #define MADT_ISO_TRIG_LEVEL 3
163 /* MADT Local APIC Address Override */
164 struct acpi_madt_lapic_addr {
165 struct acpi_madt_ent mla_hdr;
166 uint16_t mla_reserved;
167 uint64_t mla_lapic_addr;
170 struct madt_lapic_enumerator {
171 struct lapic_enumerator enumerator;
172 vm_paddr_t madt_paddr;
175 typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
176 typedef int (*madt_iter_t)(void *,
177 const struct acpi_madt_ent *);
179 static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
180 static void *madt_sdth_map(vm_paddr_t);
181 static void madt_sdth_unmap(struct acpi_sdth *);
182 static vm_paddr_t madt_search_xsdt(vm_paddr_t);
183 static vm_paddr_t madt_search_rsdt(vm_paddr_t);
184 static int madt_check(vm_paddr_t);
185 static int madt_iterate_entries(struct acpi_madt *,
186 madt_iter_t, void *);
188 static vm_paddr_t madt_probe(void);
189 static vm_offset_t madt_pass1(vm_paddr_t);
190 static int madt_pass2(vm_paddr_t, int);
192 static void madt_lapic_enumerate(struct lapic_enumerator *);
193 static int madt_lapic_probe(struct lapic_enumerator *);
195 extern u_long ebda_addr;
200 const struct acpi_rsdp *rsdp;
201 madt_search_t search;
202 vm_paddr_t search_paddr, madt_paddr;
206 if (ebda_addr != 0) {
207 mapsz = ACPI_RSDP_EBDA_MAPSZ;
208 ptr = pmap_mapdev(ebda_addr, mapsz);
210 rsdp = madt_rsdp_search(ptr, mapsz);
212 MADT_VPRINTF("RSDP not in EBDA\n");
213 pmap_unmapdev((vm_offset_t)ptr, mapsz);
218 MADT_VPRINTF("RSDP in EBDA\n");
223 mapsz = ACPI_RSDP_BIOS_MAPSZ;
224 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
226 rsdp = madt_rsdp_search(ptr, mapsz);
228 kprintf("madt_probe: no RSDP\n");
229 pmap_unmapdev((vm_offset_t)ptr, mapsz);
232 MADT_VPRINTF("RSDP in BIOS mem\n");
236 if (rsdp->rsdp_rev != 2) {
237 search_paddr = rsdp->rsdp_rsdt;
238 search = madt_search_rsdt;
240 search_paddr = rsdp->rsdp_xsdt;
241 search = madt_search_xsdt;
243 pmap_unmapdev((vm_offset_t)ptr, mapsz);
245 madt_paddr = search(search_paddr);
246 if (madt_paddr == 0) {
247 kprintf("madt_probe: can't locate MADT\n");
251 /* Preliminary checks */
252 if (madt_check(madt_paddr))
257 static const struct acpi_rsdp *
258 madt_rsdp_search(const uint8_t *target, int size)
260 const struct acpi_rsdp *rsdp;
263 KKASSERT(size > sizeof(*rsdp));
265 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
266 rsdp = (const struct acpi_rsdp *)&target[i];
267 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
268 ACPI_RSDP_SIGLEN) == 0)
275 madt_sdth_map(vm_paddr_t paddr)
277 struct acpi_sdth *sdth;
280 sdth = pmap_mapdev(paddr, sizeof(*sdth));
281 mapsz = sdth->sdth_len;
282 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
284 if (mapsz < sizeof(*sdth))
287 return pmap_mapdev(paddr, mapsz);
291 madt_sdth_unmap(struct acpi_sdth *sdth)
293 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
297 madt_search_xsdt(vm_paddr_t xsdt_paddr)
299 struct acpi_xsdt *xsdt;
300 vm_paddr_t madt_paddr = 0;
303 if (xsdt_paddr == 0) {
304 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
308 xsdt = madt_sdth_map(xsdt_paddr);
310 kprintf("madt_search_xsdt: can't map XSDT\n");
314 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
315 ACPI_SDTH_SIGLEN) != 0) {
316 kprintf("madt_search_xsdt: not XSDT\n");
320 if (xsdt->xsdt_hdr.sdth_rev != 1) {
321 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
322 xsdt->xsdt_hdr.sdth_rev);
326 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
327 sizeof(xsdt->xsdt_ents[0]);
328 for (i = 0; i < nent; ++i) {
329 struct acpi_sdth *sdth;
331 if (xsdt->xsdt_ents[i] == 0)
334 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
338 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
340 madt_sdth_unmap(sdth);
343 MADT_VPRINTF("MADT in XSDT\n");
344 madt_paddr = xsdt->xsdt_ents[i];
350 madt_sdth_unmap(&xsdt->xsdt_hdr);
355 madt_search_rsdt(vm_paddr_t rsdt_paddr)
357 struct acpi_rsdt *rsdt;
358 vm_paddr_t madt_paddr = 0;
361 if (rsdt_paddr == 0) {
362 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
366 rsdt = madt_sdth_map(rsdt_paddr);
368 kprintf("madt_search_rsdt: can't map RSDT\n");
372 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
373 ACPI_SDTH_SIGLEN) != 0) {
374 kprintf("madt_search_rsdt: not RSDT\n");
378 if (rsdt->rsdt_hdr.sdth_rev != 1) {
379 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
380 rsdt->rsdt_hdr.sdth_rev);
384 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
385 sizeof(rsdt->rsdt_ents[0]);
386 for (i = 0; i < nent; ++i) {
387 struct acpi_sdth *sdth;
389 if (rsdt->rsdt_ents[i] == 0)
392 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
396 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
398 madt_sdth_unmap(sdth);
401 MADT_VPRINTF("MADT in RSDT\n");
402 madt_paddr = rsdt->rsdt_ents[i];
408 madt_sdth_unmap(&rsdt->rsdt_hdr);
413 madt_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
415 const struct acpi_madt_lapic_addr *lapic_addr_ent;
416 uint64_t *addr64 = xarg;
418 if (ent->me_type != MADT_ENT_LAPIC_ADDR)
420 if (ent->me_len < sizeof(*lapic_addr_ent)) {
421 kprintf("madt_pass1: invalid LAPIC address override length\n");
424 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
426 *addr64 = lapic_addr_ent->mla_lapic_addr;
431 madt_pass1(vm_paddr_t madt_paddr)
433 struct acpi_madt *madt;
434 vm_offset_t lapic_addr;
435 uint64_t lapic_addr64;
438 KKASSERT(madt_paddr != 0);
440 madt = madt_sdth_map(madt_paddr);
441 KKASSERT(madt != NULL);
443 MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
444 madt->madt_lapic_addr, madt->madt_flags);
445 lapic_addr = madt->madt_lapic_addr;
448 error = madt_iterate_entries(madt, madt_pass1_callback, &lapic_addr64);
450 panic("madt_iterate_entries(pass1) failed\n");
452 if (lapic_addr64 != 0) {
453 kprintf("Warning: 64bits lapic address 0x%llx\n", lapic_addr64);
454 /* XXX vm_offset_t is 32bits on i386 */
455 lapic_addr = lapic_addr64;
458 madt_sdth_unmap(&madt->madt_hdr);
463 struct madt_pass2_cbarg {
470 madt_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
472 const struct acpi_madt_lapic *lapic_ent;
473 struct madt_pass2_cbarg *arg = xarg;
475 if (ent->me_type != MADT_ENT_LAPIC)
478 lapic_ent = (const struct acpi_madt_lapic *)ent;
479 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
480 MADT_VPRINTF("cpu_id %d, apic_id %d\n",
481 lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
482 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
483 mp_set_cpuids(0, lapic_ent->ml_apic_id);
486 mp_set_cpuids(arg->cpu, lapic_ent->ml_apic_id);
494 madt_pass2(vm_paddr_t madt_paddr, int bsp_apic_id)
496 struct acpi_madt *madt;
497 struct madt_pass2_cbarg arg;
500 MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
502 KKASSERT(madt_paddr != 0);
504 madt = madt_sdth_map(madt_paddr);
505 KKASSERT(madt != NULL);
507 bzero(&arg, sizeof(arg));
509 arg.bsp_apic_id = bsp_apic_id;
511 error = madt_iterate_entries(madt, madt_pass2_callback, &arg);
513 panic("madt_iterate_entries(pass2) failed\n");
515 KKASSERT(arg.bsp_found);
516 KKASSERT(arg.cpu > 1);
517 mp_naps = arg.cpu - 1; /* exclude BSP */
519 madt_sdth_unmap(&madt->madt_hdr);
524 struct madt_check_cbarg {
529 madt_check_callback(void *xarg, const struct acpi_madt_ent *ent)
531 struct madt_check_cbarg *arg = xarg;
532 const struct acpi_madt_lapic *lapic_ent;
534 if (ent->me_type != MADT_ENT_LAPIC)
536 lapic_ent = (const struct acpi_madt_lapic *)ent;
538 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
544 madt_check(vm_paddr_t madt_paddr)
546 struct madt_check_cbarg arg;
547 struct acpi_madt *madt;
550 KKASSERT(madt_paddr != 0);
552 madt = madt_sdth_map(madt_paddr);
553 KKASSERT(madt != NULL);
555 if (madt->madt_hdr.sdth_rev != 1 && madt->madt_hdr.sdth_rev != 2) {
556 kprintf("madt_check: unsupported MADT revision %d\n",
557 madt->madt_hdr.sdth_rev);
562 if (madt->madt_hdr.sdth_len <
563 sizeof(*madt) - sizeof(madt->madt_ents)) {
564 kprintf("madt_check: invalid MADT length %u\n",
565 madt->madt_hdr.sdth_len);
570 bzero(&arg, sizeof(arg));
572 error = madt_iterate_entries(madt, madt_check_callback, &arg);
574 if (arg.cpu_count <= 1) {
575 kprintf("madt_check: less than 2 CPUs is found\n");
580 madt_sdth_unmap(&madt->madt_hdr);
585 madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
587 int size, cur, error;
589 size = madt->madt_hdr.sdth_len -
590 (sizeof(*madt) - sizeof(madt->madt_ents));
594 while (size - cur > sizeof(struct acpi_madt_ent)) {
595 const struct acpi_madt_ent *ent;
597 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
598 if (ent->me_len < sizeof(*ent)) {
599 kprintf("madt_iterate_entries: invalid MADT "
600 "entry len %d\n", ent->me_len);
604 if (ent->me_len > (size - cur)) {
605 kprintf("madt_iterate_entries: invalid MADT "
606 "entry len %d, > table length\n", ent->me_len);
614 * Only Local APIC, I/O APIC and Interrupt Source Override
615 * are defined in ACPI specification 1.0 - 4.0
617 switch (ent->me_type) {
619 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
620 kprintf("madt_iterate_entries: invalid MADT "
621 "lapic entry len %d\n", ent->me_len);
626 case MADT_ENT_IOAPIC:
627 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
628 kprintf("madt_iterate_entries: invalid MADT "
629 "ioapic entry len %d\n", ent->me_len);
634 case MADT_ENT_INTSRC_OVR:
635 if (ent->me_len < sizeof(struct acpi_madt_intsrc_ovr)) {
636 kprintf("madt_iterate_entries: invalid MADT "
637 "intsrc_ovr entry len %d\n",
646 error = func(arg, ent);
654 madt_lapic_probe(struct lapic_enumerator *e)
656 vm_paddr_t madt_paddr;
658 madt_paddr = madt_probe();
662 ((struct madt_lapic_enumerator *)e)->madt_paddr = madt_paddr;
667 madt_lapic_enumerate(struct lapic_enumerator *e)
669 vm_paddr_t madt_paddr;
670 vm_offset_t lapic_addr;
673 madt_paddr = ((struct madt_lapic_enumerator *)e)->madt_paddr;
674 KKASSERT(madt_paddr != 0);
676 lapic_addr = madt_pass1(madt_paddr);
678 panic("madt_lapic_enumerate no local apic\n");
680 lapic_map(lapic_addr);
682 bsp_apic_id = APIC_ID(lapic.id);
683 if (madt_pass2(madt_paddr, bsp_apic_id))
684 panic("mp_enable: madt_pass2 failed\n");
687 static struct madt_lapic_enumerator madt_lapic_enumerator = {
689 .lapic_prio = LAPIC_ENUM_PRIO_MADT,
690 .lapic_probe = madt_lapic_probe,
691 .lapic_enumerate = madt_lapic_enumerate
696 madt_apic_register(void)
700 prio = LAPIC_ENUM_PRIO_MADT;
701 kgetenv_int("hw.madt_lapic_prio", &prio);
702 madt_lapic_enumerator.enumerator.lapic_prio = prio;
704 lapic_enumerator_register(&madt_lapic_enumerator.enumerator);
706 SYSINIT(madt, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_apic_register, 0);