i386/madt: Allow systems with only one CPU to boot with SMP kernel
[dragonfly.git] / sys / platform / pc32 / acpica5 / acpi_madt.c
CommitLineData
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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>
ae80be10 36#include <sys/bus.h>
281d9482 37#include <sys/kernel.h>
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38#include <sys/systm.h>
39
40#include <machine/pmap.h>
41#include <machine/smp.h>
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42#include <machine/md_var.h>
43#include <machine/specialreg.h>
3340ac41 44#include <machine_base/apic/lapic.h>
cb7d6921 45#include <machine_base/apic/ioapic.h>
85fd9f87 46
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47#include "acpi_sdt.h"
48#include "acpi_sdt_var.h"
49
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50#define MADT_VPRINTF(fmt, arg...) \
51do { \
52 if (bootverbose) \
53 kprintf("ACPI MADT: " fmt , ##arg); \
54} while (0)
55
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56/* Multiple APIC Description Table */
57struct acpi_madt {
58 struct acpi_sdth madt_hdr;
59 uint32_t madt_lapic_addr;
60 uint32_t madt_flags;
61 uint8_t madt_ents[1];
62} __packed;
63
64/* Common parts of MADT APIC structure */
65struct acpi_madt_ent {
66 uint8_t me_type; /* MADT_ENT_ */
67 uint8_t me_len;
68} __packed;
69
70#define MADT_ENT_LAPIC 0
030832e4 71#define MADT_ENT_IOAPIC 1
65b2387f 72#define MADT_ENT_INTSRC 2
e25b100a 73#define MADT_ENT_LAPIC_ADDR 5
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74
75/* MADT Processor Local APIC */
76struct acpi_madt_lapic {
77 struct acpi_madt_ent ml_hdr;
78 uint8_t ml_cpu_id;
79 uint8_t ml_apic_id;
80 uint32_t ml_flags; /* MADT_LAPIC_ */
81} __packed;
82
83#define MADT_LAPIC_ENABLED 0x1
84
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85/* MADT I/O APIC */
86struct acpi_madt_ioapic {
87 struct acpi_madt_ent mio_hdr;
88 uint8_t mio_apic_id;
89 uint8_t mio_reserved;
90 uint32_t mio_addr;
91 uint32_t mio_gsi_base;
92} __packed;
93
2bbbec42 94/* MADT Interrupt Source Override */
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95struct acpi_madt_intsrc {
96 struct acpi_madt_ent mint_hdr;
65b2387f 97 uint8_t mint_bus; /* MADT_INT_BUS_ */
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98 uint8_t mint_src;
99 uint32_t mint_gsi;
100 uint16_t mint_flags; /* MADT_INT_ */
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101} __packed;
102
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103#define MADT_INT_BUS_ISA 0
104
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105#define MADT_INT_POLA_MASK 0x3
106#define MADT_INT_POLA_SHIFT 0
107#define MADT_INT_POLA_CONFORM 0
108#define MADT_INT_POLA_HIGH 1
109#define MADT_INT_POLA_RSVD 2
110#define MADT_INT_POLA_LOW 3
111#define MADT_INT_TRIG_MASK 0xc
112#define MADT_INT_TRIG_SHIFT 2
113#define MADT_INT_TRIG_CONFORM 0
114#define MADT_INT_TRIG_EDGE 1
115#define MADT_INT_TRIG_RSVD 2
116#define MADT_INT_TRIG_LEVEL 3
2bbbec42 117
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118/* MADT Local APIC Address Override */
119struct acpi_madt_lapic_addr {
120 struct acpi_madt_ent mla_hdr;
121 uint16_t mla_reserved;
122 uint64_t mla_lapic_addr;
123} __packed;
124
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125typedef int (*madt_iter_t)(void *,
126 const struct acpi_madt_ent *);
85fd9f87 127
223bf214 128static int madt_check(vm_paddr_t);
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129static int madt_iterate_entries(struct acpi_madt *,
130 madt_iter_t, void *);
85fd9f87 131
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132static vm_offset_t madt_lapic_pass1(void);
133static int madt_lapic_pass2(int);
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134
135static void madt_lapic_enumerate(struct lapic_enumerator *);
136static int madt_lapic_probe(struct lapic_enumerator *);
137
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138static void madt_ioapic_enumerate(
139 struct ioapic_enumerator *);
140static int madt_ioapic_probe(struct ioapic_enumerator *);
141
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142static vm_paddr_t madt_phyaddr;
143
144static void
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145madt_probe(void)
146{
d6c62a5d 147 vm_paddr_t madt_paddr;
85fd9f87 148
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149 KKASSERT(madt_phyaddr == 0);
150
d6c62a5d 151 madt_paddr = sdt_search(ACPI_MADT_SIG);
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152 if (madt_paddr == 0) {
153 kprintf("madt_probe: can't locate MADT\n");
86120698 154 return;
85fd9f87 155 }
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156
157 /* Preliminary checks */
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158 if (madt_check(madt_paddr)) {
159 kprintf("madt_probe: madt_check failed\n");
160 return;
161 }
162
163 madt_phyaddr = madt_paddr;
85fd9f87 164}
d6c62a5d 165SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, madt_probe, 0);
85fd9f87 166
e25b100a 167static int
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168madt_check(vm_paddr_t madt_paddr)
169{
170 struct acpi_madt *madt;
171 int error = 0;
172
173 KKASSERT(madt_paddr != 0);
174
d6c62a5d 175 madt = sdt_sdth_map(madt_paddr);
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176 KKASSERT(madt != NULL);
177
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178 /*
179 * MADT in ACPI specification 1.0 - 4.0
180 */
181 if (madt->madt_hdr.sdth_rev < 1 || madt->madt_hdr.sdth_rev > 3) {
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182 kprintf("madt_check: unsupported MADT revision %d\n",
183 madt->madt_hdr.sdth_rev);
184 error = EOPNOTSUPP;
185 goto back;
186 }
187
188 if (madt->madt_hdr.sdth_len <
189 sizeof(*madt) - sizeof(madt->madt_ents)) {
190 kprintf("madt_check: invalid MADT length %u\n",
191 madt->madt_hdr.sdth_len);
192 error = EINVAL;
193 goto back;
194 }
195back:
d6c62a5d 196 sdt_sdth_unmap(&madt->madt_hdr);
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197 return error;
198}
199
200static int
201madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
202{
203 int size, cur, error;
204
205 size = madt->madt_hdr.sdth_len -
206 (sizeof(*madt) - sizeof(madt->madt_ents));
207 cur = 0;
208 error = 0;
209
210 while (size - cur > sizeof(struct acpi_madt_ent)) {
211 const struct acpi_madt_ent *ent;
212
213 ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
214 if (ent->me_len < sizeof(*ent)) {
215 kprintf("madt_iterate_entries: invalid MADT "
216 "entry len %d\n", ent->me_len);
217 error = EINVAL;
218 break;
219 }
220 if (ent->me_len > (size - cur)) {
221 kprintf("madt_iterate_entries: invalid MADT "
222 "entry len %d, > table length\n", ent->me_len);
223 error = EINVAL;
224 break;
225 }
226
227 cur += ent->me_len;
228
229 /*
230 * Only Local APIC, I/O APIC and Interrupt Source Override
231 * are defined in ACPI specification 1.0 - 4.0
232 */
233 switch (ent->me_type) {
234 case MADT_ENT_LAPIC:
235 if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
236 kprintf("madt_iterate_entries: invalid MADT "
237 "lapic entry len %d\n", ent->me_len);
238 error = EINVAL;
239 }
240 break;
241
242 case MADT_ENT_IOAPIC:
243 if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
244 kprintf("madt_iterate_entries: invalid MADT "
245 "ioapic entry len %d\n", ent->me_len);
246 error = EINVAL;
247 }
248 break;
249
65b2387f 250 case MADT_ENT_INTSRC:
922e4bcb 251 if (ent->me_len < sizeof(struct acpi_madt_intsrc)) {
27b59776 252 kprintf("madt_iterate_entries: invalid MADT "
922e4bcb 253 "intsrc entry len %d\n",
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254 ent->me_len);
255 error = EINVAL;
256 }
257 break;
258 }
259 if (error)
260 break;
261
262 error = func(arg, ent);
263 if (error)
264 break;
265 }
266 return error;
267}
268
269static int
270madt_lapic_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
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271{
272 const struct acpi_madt_lapic_addr *lapic_addr_ent;
273 uint64_t *addr64 = xarg;
274
275 if (ent->me_type != MADT_ENT_LAPIC_ADDR)
276 return 0;
277 if (ent->me_len < sizeof(*lapic_addr_ent)) {
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278 kprintf("madt_lapic_pass1: "
279 "invalid LAPIC address override length\n");
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280 return 0;
281 }
282 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
283
284 *addr64 = lapic_addr_ent->mla_lapic_addr;
285 return 0;
286}
287
281d9482 288static vm_offset_t
27b59776 289madt_lapic_pass1(void)
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290{
291 struct acpi_madt *madt;
223bf214 292 vm_offset_t lapic_addr;
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293 uint64_t lapic_addr64;
294 int error;
85fd9f87 295
86120698 296 KKASSERT(madt_phyaddr != 0);
85fd9f87 297
d6c62a5d 298 madt = sdt_sdth_map(madt_phyaddr);
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299 KKASSERT(madt != NULL);
300
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301 MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
302 madt->madt_lapic_addr, madt->madt_flags);
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303 lapic_addr = madt->madt_lapic_addr;
304
e25b100a 305 lapic_addr64 = 0;
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306 error = madt_iterate_entries(madt, madt_lapic_pass1_callback,
307 &lapic_addr64);
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308 if (error)
309 panic("madt_iterate_entries(pass1) failed\n");
310
311 if (lapic_addr64 != 0) {
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312 kprintf("ACPI MADT: warning 64bits lapic address 0x%llx\n",
313 lapic_addr64);
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314 /* XXX vm_offset_t is 32bits on i386 */
315 lapic_addr = lapic_addr64;
316 }
317
d6c62a5d 318 sdt_sdth_unmap(&madt->madt_hdr);
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319
320 return lapic_addr;
321}
322
27b59776 323struct madt_lapic_pass2_cbarg {
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324 int cpu;
325 int bsp_found;
326 int bsp_apic_id;
327};
328
329static int
27b59776 330madt_lapic_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
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331{
332 const struct acpi_madt_lapic *lapic_ent;
27b59776 333 struct madt_lapic_pass2_cbarg *arg = xarg;
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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) {
65b2387f 340 MADT_VPRINTF("cpu id %d, apic id %d\n",
e907d51d 341 lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
a11898be 342 if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
41e2c7e0 343 lapic_set_cpuid(0, lapic_ent->ml_apic_id);
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344 arg->bsp_found = 1;
345 } else {
41e2c7e0 346 lapic_set_cpuid(arg->cpu, lapic_ent->ml_apic_id);
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347 arg->cpu++;
348 }
349 }
350 return 0;
351}
352
281d9482 353static int
27b59776 354madt_lapic_pass2(int bsp_apic_id)
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355{
356 struct acpi_madt *madt;
27b59776 357 struct madt_lapic_pass2_cbarg arg;
a11898be 358 int error;
223bf214 359
e907d51d 360 MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
223bf214 361
86120698 362 KKASSERT(madt_phyaddr != 0);
223bf214 363
d6c62a5d 364 madt = sdt_sdth_map(madt_phyaddr);
223bf214 365 KKASSERT(madt != NULL);
85fd9f87 366
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367 bzero(&arg, sizeof(arg));
368 arg.cpu = 1;
369 arg.bsp_apic_id = bsp_apic_id;
85fd9f87 370
27b59776 371 error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg);
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372 if (error)
373 panic("madt_iterate_entries(pass2) failed\n");
85fd9f87 374
a11898be 375 KKASSERT(arg.bsp_found);
a11898be 376 mp_naps = arg.cpu - 1; /* exclude BSP */
223bf214 377
d6c62a5d 378 sdt_sdth_unmap(&madt->madt_hdr);
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379
380 return 0;
223bf214
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381}
382
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383struct madt_lapic_probe_cbarg {
384 int cpu_count;
385 vm_offset_t lapic_addr;
386};
387
388static int
389madt_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 } else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
400 const struct acpi_madt_lapic_addr *lapic_addr_ent;
401
402 if (ent->me_len < sizeof(*lapic_addr_ent)) {
403 kprintf("madt_lapic_probe: "
404 "invalid LAPIC address override length\n");
405 return 0;
406 }
407 lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
408
409 if (lapic_addr_ent->mla_lapic_addr != 0)
410 arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
411 }
412 return 0;
413}
414
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415static int
416madt_lapic_probe(struct lapic_enumerator *e)
417{
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418 struct madt_lapic_probe_cbarg arg;
419 struct acpi_madt *madt;
420 int error;
281d9482 421
86120698 422 if (madt_phyaddr == 0)
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423 return ENXIO;
424
d6c62a5d 425 madt = sdt_sdth_map(madt_phyaddr);
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426 KKASSERT(madt != NULL);
427
428 bzero(&arg, sizeof(arg));
429 arg.lapic_addr = madt->madt_lapic_addr;
430
431 error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
432 if (!error) {
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433 if (arg.cpu_count == 0) {
434 kprintf("madt_lapic_probe: no CPU is found\n");
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435 error = EOPNOTSUPP;
436 }
437 if (arg.lapic_addr == 0) {
438 kprintf("madt_lapic_probe: zero LAPIC address\n");
439 error = EOPNOTSUPP;
440 }
441 }
442
d6c62a5d 443 sdt_sdth_unmap(&madt->madt_hdr);
86120698 444 return error;
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445}
446
447static void
448madt_lapic_enumerate(struct lapic_enumerator *e)
449{
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450 vm_offset_t lapic_addr;
451 int bsp_apic_id;
452
86120698 453 KKASSERT(madt_phyaddr != 0);
281d9482 454
27b59776 455 lapic_addr = madt_lapic_pass1();
281d9482 456 if (lapic_addr == 0)
86120698 457 panic("madt_lapic_enumerate: no local apic\n");
281d9482 458
84cc808b 459 lapic_map(lapic_addr);
733c107f 460
cb7d6921 461 bsp_apic_id = APIC_ID(lapic->id);
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462 if (madt_lapic_pass2(bsp_apic_id))
463 panic("madt_lapic_enumerate: madt_lapic_pass2 failed\n");
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464}
465
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466static struct lapic_enumerator madt_lapic_enumerator = {
467 .lapic_prio = LAPIC_ENUM_PRIO_MADT,
468 .lapic_probe = madt_lapic_probe,
469 .lapic_enumerate = madt_lapic_enumerate
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470};
471
472static void
27b59776 473madt_lapic_enum_register(void)
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474{
475 int prio;
476
477 prio = LAPIC_ENUM_PRIO_MADT;
478 kgetenv_int("hw.madt_lapic_prio", &prio);
86120698 479 madt_lapic_enumerator.lapic_prio = prio;
281d9482 480
86120698 481 lapic_enumerator_register(&madt_lapic_enumerator);
281d9482 482}
27b59776 483SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0);
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484
485struct madt_ioapic_probe_cbarg {
486 int ioapic_cnt;
487 int gsi_base0;
488};
489
490static int
491madt_ioapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
492{
493 struct madt_ioapic_probe_cbarg *arg = xarg;
494
495 if (ent->me_type == MADT_ENT_INTSRC) {
496 const struct acpi_madt_intsrc *intsrc_ent;
497 int trig, pola;
498
499 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
500
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501 /* XXX magic number */
502 if (intsrc_ent->mint_src >= 16) {
503 kprintf("madt_ioapic_probe: invalid intsrc irq (%d)\n",
504 intsrc_ent->mint_src);
505 return EINVAL;
506 }
507
65b2387f 508 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) {
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509 kprintf("ACPI MADT: warning intsrc irq %d "
510 "bus is not ISA (%d)\n",
511 intsrc_ent->mint_src, intsrc_ent->mint_bus);
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512 }
513
514 trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
515 MADT_INT_TRIG_SHIFT;
ae80be10 516 if (trig == MADT_INT_TRIG_RSVD) {
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517 kprintf("ACPI MADT: warning invalid intsrc irq %d "
518 "trig (%d)\n", intsrc_ent->mint_src, trig);
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519 }
520
521 pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
522 MADT_INT_POLA_SHIFT;
ae80be10 523 if (pola == MADT_INT_POLA_RSVD) {
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524 kprintf("ACPI MADT: warning invalid intsrc irq %d "
525 "pola (%d)\n", intsrc_ent->mint_src, pola);
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526 }
527 } else if (ent->me_type == MADT_ENT_IOAPIC) {
528 const struct acpi_madt_ioapic *ioapic_ent;
529
530 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
531 if (ioapic_ent->mio_addr == 0) {
532 kprintf("madt_ioapic_probe: zero IOAPIC address\n");
533 return EINVAL;
534 }
535
536 arg->ioapic_cnt++;
537 if (ioapic_ent->mio_gsi_base == 0)
538 arg->gsi_base0 = 1;
539 }
540 return 0;
541}
542
543static int
544madt_ioapic_probe(struct ioapic_enumerator *e)
545{
546 struct madt_ioapic_probe_cbarg arg;
547 struct acpi_madt *madt;
548 int error;
549
550 if (madt_phyaddr == 0)
551 return ENXIO;
552
d6c62a5d 553 madt = sdt_sdth_map(madt_phyaddr);
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554 KKASSERT(madt != NULL);
555
556 bzero(&arg, sizeof(arg));
557
558 error = madt_iterate_entries(madt, madt_ioapic_probe_callback, &arg);
559 if (!error) {
560 if (arg.ioapic_cnt == 0) {
561 kprintf("madt_ioapic_probe: no IOAPIC\n");
562 error = ENXIO;
563 }
564 if (!arg.gsi_base0) {
565 kprintf("madt_ioapic_probe: no GSI base 0\n");
566 error = EINVAL;
567 }
568 }
569
d6c62a5d 570 sdt_sdth_unmap(&madt->madt_hdr);
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571 return error;
572}
573
574static int
575madt_ioapic_enum_callback(void *xarg, const struct acpi_madt_ent *ent)
576{
577 if (ent->me_type == MADT_ENT_INTSRC) {
578 const struct acpi_madt_intsrc *intsrc_ent;
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579 enum intr_trigger trig;
580 enum intr_polarity pola;
581 int ent_trig;
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582
583 intsrc_ent = (const struct acpi_madt_intsrc *)ent;
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584
585 KKASSERT(intsrc_ent->mint_src < 16);
586 if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA)
587 return 0;
588
589 ent_trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
590 MADT_INT_TRIG_SHIFT;
591 if (ent_trig == MADT_INT_TRIG_RSVD) {
1365d5cd 592 return 0;
ca4177e4 593#ifdef notyet
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594 } else if (ent_trig == MADT_INT_TRIG_LEVEL) {
595 trig = INTR_TRIGGER_LEVEL;
596 pola = INTR_POLARITY_LOW;
ca4177e4 597#endif
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598 } else {
599 trig = INTR_TRIGGER_EDGE;
600 pola = INTR_POLARITY_HIGH;
601 }
602
603 if (intsrc_ent->mint_src == intsrc_ent->mint_gsi &&
604 trig == INTR_TRIGGER_EDGE) {
605 /* Nothing changed */
606 return 0;
607 }
1365d5cd 608
4ecd5d4d 609 MADT_VPRINTF("INTSRC irq %d -> gsi %u %s/%s\n",
ae80be10 610 intsrc_ent->mint_src, intsrc_ent->mint_gsi,
4ecd5d4d 611 intr_str_trigger(trig), intr_str_polarity(pola));
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612 ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi,
613 trig, pola);
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614 } else if (ent->me_type == MADT_ENT_IOAPIC) {
615 const struct acpi_madt_ioapic *ioapic_ent;
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616 uint32_t ver;
617 void *addr;
618 int npin;
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619
620 ioapic_ent = (const struct acpi_madt_ioapic *)ent;
621 MADT_VPRINTF("IOAPIC addr 0x%08x, apic id %d, gsi base %u\n",
622 ioapic_ent->mio_addr, ioapic_ent->mio_apic_id,
623 ioapic_ent->mio_gsi_base);
ebf4f417 624
6ac31e9d 625 addr = ioapic_map(ioapic_ent->mio_addr);
ebf4f417 626
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627 ver = ioapic_read(addr, IOAPIC_VER);
628 npin = ((ver & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) + 1;
ebf4f417 629
6ac31e9d 630 ioapic_add(addr, ioapic_ent->mio_gsi_base, npin);
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631 }
632 return 0;
633}
634
635static void
636madt_ioapic_enumerate(struct ioapic_enumerator *e)
637{
638 struct acpi_madt *madt;
639 int error;
640
641 KKASSERT(madt_phyaddr != 0);
642
d6c62a5d 643 madt = sdt_sdth_map(madt_phyaddr);
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644 KKASSERT(madt != NULL);
645
646 error = madt_iterate_entries(madt, madt_ioapic_enum_callback, NULL);
647 if (error)
648 panic("madt_ioapic_enumerate failed\n");
649
d6c62a5d 650 sdt_sdth_unmap(&madt->madt_hdr);
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651}
652
653static struct ioapic_enumerator madt_ioapic_enumerator = {
654 .ioapic_prio = IOAPIC_ENUM_PRIO_MADT,
655 .ioapic_probe = madt_ioapic_probe,
656 .ioapic_enumerate = madt_ioapic_enumerate
657};
658
659static void
660madt_ioapic_enum_register(void)
661{
662 int prio;
663
664 prio = IOAPIC_ENUM_PRIO_MADT;
665 kgetenv_int("hw.madt_ioapic_prio", &prio);
666 madt_ioapic_enumerator.ioapic_prio = prio;
667
668 ioapic_enumerator_register(&madt_ioapic_enumerator);
669}
670SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY,
671 madt_ioapic_enum_register, 0);