Add regression tests for /bin/sh.
[dragonfly.git] / sys / platform / pc64 / x86_64 / mp_madt.c
CommitLineData
8e4c6923
MN
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;
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
32 * SUCH DAMAGE.
33 */
34
35#include <sys/param.h>
91903a05 36#include <sys/kernel.h>
8e4c6923
MN
37#include <sys/systm.h>
38
39#include <machine/pmap.h>
40#include <machine/smp.h>
ee5932ac
MN
41#include <machine/md_var.h>
42#include <machine/specialreg.h>
91903a05 43#include <machine_base/apic/mpapic.h>
8e4c6923 44
c87b587d
MN
45#define MADT_VPRINTF(fmt, arg...) \
46do { \
47 if (bootverbose) \
48 kprintf("ACPI MADT: " fmt , ##arg); \
49} while (0)
50
8e4c6923
MN
51#define ACPI_RSDP_EBDA_MAPSZ 1024
52#define ACPI_RSDP_BIOS_MAPSZ 0x20000
53#define ACPI_RSDP_BIOS_MAPADDR 0xe0000
54
55#define ACPI_RSDP_ALIGN 16
56
57#define ACPI_RSDP_SIGLEN 8
58#define ACPI_RSDP_SIG "RSD PTR "
59
60#define ACPI_SDTH_SIGLEN 4
61#define ACPI_RSDT_SIG "RSDT"
62#define ACPI_XSDT_SIG "XSDT"
63#define ACPI_MADT_SIG "APIC"
64
65/* Root System Description Pointer */
66struct acpi_rsdp {
67 uint8_t rsdp_sig[ACPI_RSDP_SIGLEN];
68 uint8_t rsdp_cksum;
69 uint8_t rsdp_oem_id[6];
70 uint8_t rsdp_rev;
71 uint32_t rsdp_rsdt;
72 uint32_t rsdp_len;
73 uint64_t rsdp_xsdt;
74 uint8_t rsdp_ext_cksum;
75 uint8_t rsdp_rsvd[3];
76} __packed;
77
78/* System Description Table Header */
79struct acpi_sdth {
80 uint8_t sdth_sig[ACPI_SDTH_SIGLEN];
81 uint32_t sdth_len;
82 uint8_t sdth_rev;
83 uint8_t sdth_cksum;
84 uint8_t sdth_oem_id[6];
85 uint8_t sdth_oem_tbid[8];
86 uint32_t sdth_oem_rev;
87 uint32_t sdth_crt_id;
88 uint32_t sdth_crt_rev;
89} __packed;
90
91/* Extended System Description Table */
92struct acpi_xsdt {
93 struct acpi_sdth xsdt_hdr;
94 uint64_t xsdt_ents[1];
95} __packed;
96
97/* Root System Description Table */
98struct acpi_rsdt {
99 struct acpi_sdth rsdt_hdr;
100 uint32_t rsdt_ents[1];
101} __packed;
102
103/* Multiple APIC Description Table */
104struct acpi_madt {
105 struct acpi_sdth madt_hdr;
106 uint32_t madt_lapic_addr;
107 uint32_t madt_flags;
108 uint8_t madt_ents[1];
109} __packed;
110
111/* Common parts of MADT APIC structure */
112struct acpi_madt_ent {
113 uint8_t me_type; /* MADT_ENT_ */
114 uint8_t me_len;
115} __packed;
116
117#define MADT_ENT_LAPIC 0
0492bd82 118#define MADT_ENT_IOAPIC 1
2bbbec42 119#define MADT_ENT_INTSRC_OVR 2
ebbde674 120#define MADT_ENT_LAPIC_ADDR 5
8e4c6923
MN
121
122/* MADT Processor Local APIC */
123struct acpi_madt_lapic {
124 struct acpi_madt_ent ml_hdr;
125 uint8_t ml_cpu_id;
126 uint8_t ml_apic_id;
127 uint32_t ml_flags; /* MADT_LAPIC_ */
128} __packed;
129
130#define MADT_LAPIC_ENABLED 0x1
131
0492bd82
MN
132/* MADT I/O APIC */
133struct acpi_madt_ioapic {
134 struct acpi_madt_ent mio_hdr;
135 uint8_t mio_apic_id;
136 uint8_t mio_reserved;
137 uint32_t mio_addr;
138 uint32_t mio_gsi_base;
139} __packed;
140
2bbbec42
SZ
141/* MADT Interrupt Source Override */
142struct acpi_madt_intsrc_ovr {
143 struct acpi_madt_ent miso_hdr;
144 uint8_t miso_bus;
145 uint8_t miso_src;
146 uint32_t miso_gsi;
147 uint16_t miso_flags; /* MADT_ISO_ */
148} __packed;
149
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
162
ebbde674
MN
163/* MADT Local APIC Address Override */
164struct acpi_madt_lapic_addr {
165 struct acpi_madt_ent mla_hdr;
166 uint16_t mla_reserved;
167 uint64_t mla_lapic_addr;
168} __packed;
169
8e4c6923 170typedef vm_paddr_t (*madt_search_t)(vm_paddr_t);
0492bd82
MN
171typedef int (*madt_iter_t)(void *,
172 const struct acpi_madt_ent *);
8e4c6923
MN
173
174static const struct acpi_rsdp *madt_rsdp_search(const uint8_t *, int);
175static void *madt_sdth_map(vm_paddr_t);
176static void madt_sdth_unmap(struct acpi_sdth *);
177static vm_paddr_t madt_search_xsdt(vm_paddr_t);
178static vm_paddr_t madt_search_rsdt(vm_paddr_t);
4ad5917f 179static int madt_check(vm_paddr_t);
0492bd82
MN
180static int madt_iterate_entries(struct acpi_madt *,
181 madt_iter_t, void *);
8e4c6923 182
86120698
SZ
183static vm_offset_t madt_pass1(void);
184static int madt_pass2(int);
91903a05
MN
185
186static void madt_lapic_enumerate(struct lapic_enumerator *);
187static int madt_lapic_probe(struct lapic_enumerator *);
188
8e4c6923
MN
189extern u_long ebda_addr;
190
86120698
SZ
191static vm_paddr_t madt_phyaddr;
192
193static void
8e4c6923
MN
194madt_probe(void)
195{
196 const struct acpi_rsdp *rsdp;
197 madt_search_t search;
198 vm_paddr_t search_paddr, madt_paddr;
199 vm_size_t mapsz;
200 uint8_t *ptr;
201
86120698
SZ
202 KKASSERT(madt_phyaddr == 0);
203
8e4c6923
MN
204 if (ebda_addr != 0) {
205 mapsz = ACPI_RSDP_EBDA_MAPSZ;
206 ptr = pmap_mapdev(ebda_addr, mapsz);
207
208 rsdp = madt_rsdp_search(ptr, mapsz);
209 if (rsdp == NULL) {
c87b587d 210 MADT_VPRINTF("RSDP not in EBDA\n");
8e4c6923
MN
211 pmap_unmapdev((vm_offset_t)ptr, mapsz);
212
213 ptr = NULL;
214 mapsz = 0;
215 } else {
c87b587d 216 MADT_VPRINTF("RSDP in EBDA\n");
8e4c6923
MN
217 goto found_rsdp;
218 }
219 }
220
221 mapsz = ACPI_RSDP_BIOS_MAPSZ;
222 ptr = pmap_mapdev(ACPI_RSDP_BIOS_MAPADDR, mapsz);
223
224 rsdp = madt_rsdp_search(ptr, mapsz);
225 if (rsdp == NULL) {
226 kprintf("madt_probe: no RSDP\n");
227 pmap_unmapdev((vm_offset_t)ptr, mapsz);
86120698 228 return;
8e4c6923 229 } else {
c87b587d 230 MADT_VPRINTF("RSDP in BIOS mem\n");
8e4c6923
MN
231 }
232
233found_rsdp:
234 if (rsdp->rsdp_rev != 2) {
235 search_paddr = rsdp->rsdp_rsdt;
236 search = madt_search_rsdt;
237 } else {
238 search_paddr = rsdp->rsdp_xsdt;
239 search = madt_search_xsdt;
240 }
241 pmap_unmapdev((vm_offset_t)ptr, mapsz);
242
243 madt_paddr = search(search_paddr);
244 if (madt_paddr == 0) {
245 kprintf("madt_probe: can't locate MADT\n");
86120698 246 return;
8e4c6923 247 }
4ad5917f
MN
248
249 /* Preliminary checks */
86120698
SZ
250 if (madt_check(madt_paddr)) {
251 kprintf("madt_probe: madt_check failed\n");
252 return;
253 }
254
255 madt_phyaddr = madt_paddr;
8e4c6923 256}
86120698 257SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_FIRST, madt_probe, 0);
8e4c6923
MN
258
259static const struct acpi_rsdp *
260madt_rsdp_search(const uint8_t *target, int size)
261{
262 const struct acpi_rsdp *rsdp;
263 int i;
264
265 KKASSERT(size > sizeof(*rsdp));
266
267 for (i = 0; i < size - sizeof(*rsdp); i += ACPI_RSDP_ALIGN) {
268 rsdp = (const struct acpi_rsdp *)&target[i];
269 if (memcmp(rsdp->rsdp_sig, ACPI_RSDP_SIG,
270 ACPI_RSDP_SIGLEN) == 0)
271 return rsdp;
272 }
273 return NULL;
274}
275
276static void *
277madt_sdth_map(vm_paddr_t paddr)
278{
279 struct acpi_sdth *sdth;
280 vm_size_t mapsz;
281
282 sdth = pmap_mapdev(paddr, sizeof(*sdth));
283 mapsz = sdth->sdth_len;
284 pmap_unmapdev((vm_offset_t)sdth, sizeof(*sdth));
285
286 if (mapsz < sizeof(*sdth))
287 return NULL;
288
289 return pmap_mapdev(paddr, mapsz);
290}
291
292static void
293madt_sdth_unmap(struct acpi_sdth *sdth)
294{
295 pmap_unmapdev((vm_offset_t)sdth, sdth->sdth_len);
296}
297
298static vm_paddr_t
299madt_search_xsdt(vm_paddr_t xsdt_paddr)
300{
301 struct acpi_xsdt *xsdt;
302 vm_paddr_t madt_paddr = 0;
303 int i, nent;
304
305 if (xsdt_paddr == 0) {
306 kprintf("madt_search_xsdt: XSDT paddr == 0\n");
307 return 0;
308 }
309
310 xsdt = madt_sdth_map(xsdt_paddr);
311 if (xsdt == NULL) {
312 kprintf("madt_search_xsdt: can't map XSDT\n");
313 return 0;
314 }
315
316 if (memcmp(xsdt->xsdt_hdr.sdth_sig, ACPI_XSDT_SIG,
317 ACPI_SDTH_SIGLEN) != 0) {
318 kprintf("madt_search_xsdt: not XSDT\n");
319 goto back;
320 }
321
322 if (xsdt->xsdt_hdr.sdth_rev != 1) {
323 kprintf("madt_search_xsdt: unsupported XSDT revision %d\n",
324 xsdt->xsdt_hdr.sdth_rev);
325 goto back;
326 }
327
328 nent = (xsdt->xsdt_hdr.sdth_len - sizeof(xsdt->xsdt_hdr)) /
329 sizeof(xsdt->xsdt_ents[0]);
330 for (i = 0; i < nent; ++i) {
331 struct acpi_sdth *sdth;
332
333 if (xsdt->xsdt_ents[i] == 0)
334 continue;
335
336 sdth = madt_sdth_map(xsdt->xsdt_ents[i]);
337 if (sdth != NULL) {
338 int ret;
339
340 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
341 ACPI_SDTH_SIGLEN);
342 madt_sdth_unmap(sdth);
343
344 if (ret == 0) {
c87b587d 345 MADT_VPRINTF("MADT in XSDT\n");
8e4c6923
MN
346 madt_paddr = xsdt->xsdt_ents[i];
347 break;
348 }
349 }
350 }
351back:
352 madt_sdth_unmap(&xsdt->xsdt_hdr);
353 return madt_paddr;
354}
355
356static vm_paddr_t
357madt_search_rsdt(vm_paddr_t rsdt_paddr)
358{
359 struct acpi_rsdt *rsdt;
360 vm_paddr_t madt_paddr = 0;
361 int i, nent;
362
363 if (rsdt_paddr == 0) {
364 kprintf("madt_search_rsdt: RSDT paddr == 0\n");
365 return 0;
366 }
367
368 rsdt = madt_sdth_map(rsdt_paddr);
369 if (rsdt == NULL) {
370 kprintf("madt_search_rsdt: can't map RSDT\n");
371 return 0;
372 }
373
374 if (memcmp(rsdt->rsdt_hdr.sdth_sig, ACPI_RSDT_SIG,
375 ACPI_SDTH_SIGLEN) != 0) {
376 kprintf("madt_search_rsdt: not RSDT\n");
377 goto back;
378 }
379
380 if (rsdt->rsdt_hdr.sdth_rev != 1) {
381 kprintf("madt_search_rsdt: unsupported RSDT revision %d\n",
382 rsdt->rsdt_hdr.sdth_rev);
383 goto back;
384 }
385
386 nent = (rsdt->rsdt_hdr.sdth_len - sizeof(rsdt->rsdt_hdr)) /
387 sizeof(rsdt->rsdt_ents[0]);
388 for (i = 0; i < nent; ++i) {
389 struct acpi_sdth *sdth;
390
391 if (rsdt->rsdt_ents[i] == 0)
392 continue;
393
394 sdth = madt_sdth_map(rsdt->rsdt_ents[i]);
395 if (sdth != NULL) {
396 int ret;
397
398 ret = memcmp(sdth->sdth_sig, ACPI_MADT_SIG,
399 ACPI_SDTH_SIGLEN);
400 madt_sdth_unmap(sdth);
401
402 if (ret == 0) {
c87b587d 403 MADT_VPRINTF("MADT in RSDT\n");
8e4c6923
MN
404 madt_paddr = rsdt->rsdt_ents[i];
405 break;
406 }
407 }
408 }
409back:
410 madt_sdth_unmap(&rsdt->rsdt_hdr);
411 return madt_paddr;
412}
413
ebbde674
MN
414static int
415madt_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
416{
417 const struct acpi_madt_lapic_addr *lapic_addr_ent;
418 uint64_t *addr64 = xarg;
419
420 if (ent->me_type != MADT_ENT_LAPIC_ADDR)
421 return 0;
422 if (ent->me_len < sizeof(*lapic_addr_ent)) {
423 kprintf("madt_pass1: invalid LAPIC address override length\n");
424 return 0;
425 }
426 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
427
428 *addr64 = lapic_addr_ent->mla_lapic_addr;
429 return 0;
430}
431
91903a05 432static vm_offset_t
86120698 433madt_pass1(void)
8e4c6923
MN
434{
435 struct acpi_madt *madt;
4ad5917f 436 vm_offset_t lapic_addr;
ebbde674
MN
437 uint64_t lapic_addr64;
438 int error;
8e4c6923 439
86120698 440 KKASSERT(madt_phyaddr != 0);
8e4c6923 441
86120698 442 madt = madt_sdth_map(madt_phyaddr);
8e4c6923
MN
443 KKASSERT(madt != NULL);
444
c87b587d
MN
445 MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
446 madt->madt_lapic_addr, madt->madt_flags);
4ad5917f
MN
447 lapic_addr = madt->madt_lapic_addr;
448
ebbde674
MN
449 lapic_addr64 = 0;
450 error = madt_iterate_entries(madt, madt_pass1_callback, &lapic_addr64);
451 if (error)
452 panic("madt_iterate_entries(pass1) failed\n");
453
454 if (lapic_addr64 != 0) {
cb31590d
SZ
455 kprintf("ACPI MADT: 64bits lapic address 0x%lx\n",
456 lapic_addr64);
ebbde674
MN
457 lapic_addr = lapic_addr64;
458 }
459
4ad5917f
MN
460 madt_sdth_unmap(&madt->madt_hdr);
461
462 return lapic_addr;
463}
464
2c394345
MN
465struct madt_pass2_cbarg {
466 int cpu;
467 int bsp_found;
468 int bsp_apic_id;
469};
470
471static int
472madt_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
473{
474 const struct acpi_madt_lapic *lapic_ent;
475 struct madt_pass2_cbarg *arg = xarg;
476
477 if (ent->me_type != MADT_ENT_LAPIC)
478 return 0;
479
480 lapic_ent = (const struct acpi_madt_lapic *)ent;
481 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
c87b587d
MN
482 MADT_VPRINTF("cpu_id %d, apic_id %d\n",
483 lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
2c394345
MN
484 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
485 mp_set_cpuids(0, lapic_ent->ml_apic_id);
486 arg->bsp_found = 1;
487 } else {
488 mp_set_cpuids(arg->cpu, lapic_ent->ml_apic_id);
489 arg->cpu++;
490 }
491 }
492 return 0;
493}
494
91903a05 495static int
86120698 496madt_pass2(int bsp_apic_id)
4ad5917f
MN
497{
498 struct acpi_madt *madt;
2c394345
MN
499 struct madt_pass2_cbarg arg;
500 int error;
4ad5917f 501
c87b587d 502 MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
4ad5917f 503
86120698 504 KKASSERT(madt_phyaddr != 0);
4ad5917f 505
86120698 506 madt = madt_sdth_map(madt_phyaddr);
4ad5917f 507 KKASSERT(madt != NULL);
8e4c6923 508
2c394345
MN
509 bzero(&arg, sizeof(arg));
510 arg.cpu = 1;
511 arg.bsp_apic_id = bsp_apic_id;
8e4c6923 512
2c394345
MN
513 error = madt_iterate_entries(madt, madt_pass2_callback, &arg);
514 if (error)
515 panic("madt_iterate_entries(pass2) failed\n");
8e4c6923 516
2c394345
MN
517 KKASSERT(arg.bsp_found);
518 KKASSERT(arg.cpu > 1);
519 mp_naps = arg.cpu - 1; /* exclude BSP */
4ad5917f
MN
520
521 madt_sdth_unmap(&madt->madt_hdr);
2c394345
MN
522
523 return 0;
4ad5917f
MN
524}
525
526static int
527madt_check(vm_paddr_t madt_paddr)
528{
529 struct acpi_madt *madt;
530 int error = 0;
531
532 KKASSERT(madt_paddr != 0);
533
534 madt = madt_sdth_map(madt_paddr);
535 KKASSERT(madt != NULL);
536
537 if (madt->madt_hdr.sdth_rev != 1 && madt->madt_hdr.sdth_rev != 2) {
538 kprintf("madt_check: unsupported MADT revision %d\n",
539 madt->madt_hdr.sdth_rev);
540 error = EOPNOTSUPP;
541 goto back;
542 }
543
544 if (madt->madt_hdr.sdth_len <
545 sizeof(*madt) - sizeof(madt->madt_ents)) {
546 kprintf("madt_check: invalid MADT length %u\n",
547 madt->madt_hdr.sdth_len);
548 error = EINVAL;
0492bd82
MN
549 goto back;
550 }
8e4c6923
MN
551back:
552 madt_sdth_unmap(&madt->madt_hdr);
553 return error;
554}
4ad5917f 555
0492bd82
MN
556static int
557madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
558{
559 int size, cur, error;
560
561 size = madt->madt_hdr.sdth_len -
562 (sizeof(*madt) - sizeof(madt->madt_ents));
563 cur = 0;
564 error = 0;
565
566 while (size - cur > sizeof(struct acpi_madt_ent)) {
567 const struct acpi_madt_ent *ent;
568
569 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
570 if (ent->me_len < sizeof(*ent)) {
571 kprintf("madt_iterate_entries: invalid MADT "
572 "entry len %d\n", ent->me_len);
573 error = EINVAL;
574 break;
575 }
576 if (ent->me_len > (size - cur)) {
577 kprintf("madt_iterate_entries: invalid MADT "
578 "entry len %d, > table length\n", ent->me_len);
579 error = EINVAL;
580 break;
581 }
582
583 cur += ent->me_len;
584
585 /*
2bbbec42
SZ
586 * Only Local APIC, I/O APIC and Interrupt Source Override
587 * are defined in ACPI specification 1.0 - 4.0
0492bd82
MN
588 */
589 switch (ent->me_type) {
590 case MADT_ENT_LAPIC:
591 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
592 kprintf("madt_iterate_entries: invalid MADT "
593 "lapic entry len %d\n", ent->me_len);
594 error = EINVAL;
595 }
596 break;
597
598 case MADT_ENT_IOAPIC:
599 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
600 kprintf("madt_iterate_entries: invalid MADT "
601 "ioapic entry len %d\n", ent->me_len);
602 error = EINVAL;
603 }
604 break;
2bbbec42
SZ
605
606 case MADT_ENT_INTSRC_OVR:
607 if (ent->me_len < sizeof(struct acpi_madt_intsrc_ovr)) {
608 kprintf("madt_iterate_entries: invalid MADT "
609 "intsrc_ovr entry len %d\n",
610 ent->me_len);
611 error = EINVAL;
612 }
613 break;
0492bd82
MN
614 }
615 if (error)
616 break;
617
618 error = func(arg, ent);
619 if (error)
620 break;
621 }
622 return error;
623}
624
86120698
SZ
625struct madt_lapic_probe_cbarg {
626 int cpu_count;
627 vm_offset_t lapic_addr;
628};
629
630static int
631madt_lapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
632{
633 struct madt_lapic_probe_cbarg *arg = xarg;
634
635 if (ent->me_type == MADT_ENT_LAPIC) {
636 const struct acpi_madt_lapic *lapic_ent;
637
638 lapic_ent = (const struct acpi_madt_lapic *)ent;
639 if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
640 arg->cpu_count++;
641 } else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
642 const struct acpi_madt_lapic_addr *lapic_addr_ent;
643
644 if (ent->me_len < sizeof(*lapic_addr_ent)) {
645 kprintf("madt_lapic_probe: "
646 "invalid LAPIC address override length\n");
647 return 0;
648 }
649 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
650
651 if (lapic_addr_ent->mla_lapic_addr != 0)
652 arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
653 }
654 return 0;
655}
656
91903a05
MN
657static int
658madt_lapic_probe(struct lapic_enumerator *e)
659{
86120698
SZ
660 struct madt_lapic_probe_cbarg arg;
661 struct acpi_madt *madt;
662 int error;
91903a05 663
86120698 664 if (madt_phyaddr == 0)
91903a05
MN
665 return ENXIO;
666
86120698
SZ
667 madt = madt_sdth_map(madt_phyaddr);
668 KKASSERT(madt != NULL);
669
670 bzero(&arg, sizeof(arg));
671 arg.lapic_addr = madt->madt_lapic_addr;
672
673 error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
674 if (!error) {
675 if (arg.cpu_count <= 1) {
676 kprintf("madt_lapic_probe: "
677 "less than 2 CPUs is found\n");
678 error = EOPNOTSUPP;
679 }
680 if (arg.lapic_addr == 0) {
681 kprintf("madt_lapic_probe: zero LAPIC address\n");
682 error = EOPNOTSUPP;
683 }
684 }
685
686 madt_sdth_unmap(&madt->madt_hdr);
687 return error;
91903a05
MN
688}
689
690static void
691madt_lapic_enumerate(struct lapic_enumerator *e)
692{
91903a05
MN
693 vm_offset_t lapic_addr;
694 int bsp_apic_id;
695
86120698 696 KKASSERT(madt_phyaddr != 0);
91903a05 697
86120698 698 lapic_addr = madt_pass1();
91903a05 699 if (lapic_addr == 0)
86120698 700 panic("madt_lapic_enumerate: no local apic\n");
91903a05 701
b44f1d28 702 lapic_map(lapic_addr);
1c1f402e
MN
703
704 bsp_apic_id = APIC_ID(lapic->id);
86120698
SZ
705 if (madt_pass2(bsp_apic_id))
706 panic("madt_lapic_enumerate: madt_pass2 failed\n");
91903a05
MN
707}
708
86120698
SZ
709static struct lapic_enumerator madt_lapic_enumerator = {
710 .lapic_prio = LAPIC_ENUM_PRIO_MADT,
711 .lapic_probe = madt_lapic_probe,
712 .lapic_enumerate = madt_lapic_enumerate
91903a05
MN
713};
714
715static void
94b7f5c1 716madt_lapic_register(void)
91903a05
MN
717{
718 int prio;
719
720 prio = LAPIC_ENUM_PRIO_MADT;
721 kgetenv_int("hw.madt_lapic_prio", &prio);
86120698 722 madt_lapic_enumerator.lapic_prio = prio;
91903a05 723
86120698 724 lapic_enumerator_register(&madt_lapic_enumerator);
91903a05 725}
86120698 726SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_register, 0);