| 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> |
| 36 | #include <sys/bus.h> |
| 37 | #include <sys/kernel.h> |
| 38 | #include <sys/systm.h> |
| 39 | |
| 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/lapic.h> |
| 45 | #include <machine_base/apic/ioapic.h> |
| 46 | |
| 47 | #include "acpi_sdt.h" |
| 48 | #include "acpi_sdt_var.h" |
| 49 | |
| 50 | #define MADT_VPRINTF(fmt, arg...) \ |
| 51 | do { \ |
| 52 | if (bootverbose) \ |
| 53 | kprintf("ACPI MADT: " fmt , ##arg); \ |
| 54 | } while (0) |
| 55 | |
| 56 | /* Multiple APIC Description Table */ |
| 57 | struct 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 */ |
| 65 | struct acpi_madt_ent { |
| 66 | uint8_t me_type; /* MADT_ENT_ */ |
| 67 | uint8_t me_len; |
| 68 | } __packed; |
| 69 | |
| 70 | #define MADT_ENT_LAPIC 0 |
| 71 | #define MADT_ENT_IOAPIC 1 |
| 72 | #define MADT_ENT_INTSRC 2 |
| 73 | #define MADT_ENT_LAPIC_ADDR 5 |
| 74 | |
| 75 | /* MADT Processor Local APIC */ |
| 76 | struct 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 | |
| 85 | /* MADT I/O APIC */ |
| 86 | struct 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 | |
| 94 | /* MADT Interrupt Source Override */ |
| 95 | struct acpi_madt_intsrc { |
| 96 | struct acpi_madt_ent mint_hdr; |
| 97 | uint8_t mint_bus; /* MADT_INT_BUS_ */ |
| 98 | uint8_t mint_src; |
| 99 | uint32_t mint_gsi; |
| 100 | uint16_t mint_flags; /* MADT_INT_ */ |
| 101 | } __packed; |
| 102 | |
| 103 | #define MADT_INT_BUS_ISA 0 |
| 104 | |
| 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 |
| 117 | |
| 118 | /* MADT Local APIC Address Override */ |
| 119 | struct 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 | |
| 125 | typedef int (*madt_iter_t)(void *, |
| 126 | const struct acpi_madt_ent *); |
| 127 | |
| 128 | static int madt_check(vm_paddr_t); |
| 129 | static int madt_iterate_entries(struct acpi_madt *, |
| 130 | madt_iter_t, void *); |
| 131 | |
| 132 | static vm_offset_t madt_lapic_pass1(void); |
| 133 | static int madt_lapic_pass2(int); |
| 134 | |
| 135 | static void madt_lapic_enumerate(struct lapic_enumerator *); |
| 136 | static int madt_lapic_probe(struct lapic_enumerator *); |
| 137 | |
| 138 | static void madt_ioapic_enumerate( |
| 139 | struct ioapic_enumerator *); |
| 140 | static int madt_ioapic_probe(struct ioapic_enumerator *); |
| 141 | |
| 142 | static vm_paddr_t madt_phyaddr; |
| 143 | |
| 144 | static void |
| 145 | madt_probe(void) |
| 146 | { |
| 147 | vm_paddr_t madt_paddr; |
| 148 | |
| 149 | KKASSERT(madt_phyaddr == 0); |
| 150 | |
| 151 | madt_paddr = sdt_search(ACPI_MADT_SIG); |
| 152 | if (madt_paddr == 0) { |
| 153 | kprintf("madt_probe: can't locate MADT\n"); |
| 154 | return; |
| 155 | } |
| 156 | |
| 157 | /* Preliminary checks */ |
| 158 | if (madt_check(madt_paddr)) { |
| 159 | kprintf("madt_probe: madt_check failed\n"); |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | madt_phyaddr = madt_paddr; |
| 164 | } |
| 165 | SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, madt_probe, 0); |
| 166 | |
| 167 | static int |
| 168 | madt_check(vm_paddr_t madt_paddr) |
| 169 | { |
| 170 | struct acpi_madt *madt; |
| 171 | int error = 0; |
| 172 | |
| 173 | KKASSERT(madt_paddr != 0); |
| 174 | |
| 175 | madt = sdt_sdth_map(madt_paddr); |
| 176 | KKASSERT(madt != NULL); |
| 177 | |
| 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) { |
| 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 | } |
| 195 | back: |
| 196 | sdt_sdth_unmap(&madt->madt_hdr); |
| 197 | return error; |
| 198 | } |
| 199 | |
| 200 | static int |
| 201 | madt_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 | |
| 250 | case MADT_ENT_INTSRC: |
| 251 | if (ent->me_len < sizeof(struct acpi_madt_intsrc)) { |
| 252 | kprintf("madt_iterate_entries: invalid MADT " |
| 253 | "intsrc entry len %d\n", |
| 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 | |
| 269 | static int |
| 270 | madt_lapic_pass1_callback(void *xarg, const struct acpi_madt_ent *ent) |
| 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)) { |
| 278 | kprintf("madt_lapic_pass1: " |
| 279 | "invalid LAPIC address override length\n"); |
| 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 | |
| 288 | static vm_offset_t |
| 289 | madt_lapic_pass1(void) |
| 290 | { |
| 291 | struct acpi_madt *madt; |
| 292 | vm_offset_t lapic_addr; |
| 293 | uint64_t lapic_addr64; |
| 294 | int error; |
| 295 | |
| 296 | KKASSERT(madt_phyaddr != 0); |
| 297 | |
| 298 | madt = sdt_sdth_map(madt_phyaddr); |
| 299 | KKASSERT(madt != NULL); |
| 300 | |
| 301 | MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n", |
| 302 | madt->madt_lapic_addr, madt->madt_flags); |
| 303 | lapic_addr = madt->madt_lapic_addr; |
| 304 | |
| 305 | lapic_addr64 = 0; |
| 306 | error = madt_iterate_entries(madt, madt_lapic_pass1_callback, |
| 307 | &lapic_addr64); |
| 308 | if (error) |
| 309 | panic("madt_iterate_entries(pass1) failed\n"); |
| 310 | |
| 311 | if (lapic_addr64 != 0) { |
| 312 | kprintf("ACPI MADT: warning 64bits lapic address 0x%llx\n", |
| 313 | lapic_addr64); |
| 314 | /* XXX vm_offset_t is 32bits on i386 */ |
| 315 | lapic_addr = lapic_addr64; |
| 316 | } |
| 317 | |
| 318 | sdt_sdth_unmap(&madt->madt_hdr); |
| 319 | |
| 320 | return lapic_addr; |
| 321 | } |
| 322 | |
| 323 | struct madt_lapic_pass2_cbarg { |
| 324 | int cpu; |
| 325 | int bsp_found; |
| 326 | int bsp_apic_id; |
| 327 | }; |
| 328 | |
| 329 | static int |
| 330 | madt_lapic_pass2_callback(void *xarg, const struct acpi_madt_ent *ent) |
| 331 | { |
| 332 | const struct acpi_madt_lapic *lapic_ent; |
| 333 | struct madt_lapic_pass2_cbarg *arg = xarg; |
| 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) { |
| 340 | MADT_VPRINTF("cpu id %d, apic id %d\n", |
| 341 | lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id); |
| 342 | if (lapic_ent->ml_apic_id == arg->bsp_apic_id) { |
| 343 | lapic_set_cpuid(0, lapic_ent->ml_apic_id); |
| 344 | arg->bsp_found = 1; |
| 345 | } else { |
| 346 | lapic_set_cpuid(arg->cpu, lapic_ent->ml_apic_id); |
| 347 | arg->cpu++; |
| 348 | } |
| 349 | } |
| 350 | return 0; |
| 351 | } |
| 352 | |
| 353 | static int |
| 354 | madt_lapic_pass2(int bsp_apic_id) |
| 355 | { |
| 356 | struct acpi_madt *madt; |
| 357 | struct madt_lapic_pass2_cbarg arg; |
| 358 | int error; |
| 359 | |
| 360 | MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id); |
| 361 | |
| 362 | KKASSERT(madt_phyaddr != 0); |
| 363 | |
| 364 | madt = sdt_sdth_map(madt_phyaddr); |
| 365 | KKASSERT(madt != NULL); |
| 366 | |
| 367 | bzero(&arg, sizeof(arg)); |
| 368 | arg.cpu = 1; |
| 369 | arg.bsp_apic_id = bsp_apic_id; |
| 370 | |
| 371 | error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg); |
| 372 | if (error) |
| 373 | panic("madt_iterate_entries(pass2) failed\n"); |
| 374 | |
| 375 | KKASSERT(arg.bsp_found); |
| 376 | mp_naps = arg.cpu - 1; /* exclude BSP */ |
| 377 | |
| 378 | sdt_sdth_unmap(&madt->madt_hdr); |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | struct madt_lapic_probe_cbarg { |
| 384 | int cpu_count; |
| 385 | vm_offset_t lapic_addr; |
| 386 | }; |
| 387 | |
| 388 | static int |
| 389 | madt_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 | |
| 415 | static int |
| 416 | madt_lapic_probe(struct lapic_enumerator *e) |
| 417 | { |
| 418 | struct madt_lapic_probe_cbarg arg; |
| 419 | struct acpi_madt *madt; |
| 420 | int error; |
| 421 | |
| 422 | if (madt_phyaddr == 0) |
| 423 | return ENXIO; |
| 424 | |
| 425 | madt = sdt_sdth_map(madt_phyaddr); |
| 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) { |
| 433 | if (arg.cpu_count == 0) { |
| 434 | kprintf("madt_lapic_probe: no CPU is found\n"); |
| 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 | |
| 443 | sdt_sdth_unmap(&madt->madt_hdr); |
| 444 | return error; |
| 445 | } |
| 446 | |
| 447 | static void |
| 448 | madt_lapic_enumerate(struct lapic_enumerator *e) |
| 449 | { |
| 450 | vm_offset_t lapic_addr; |
| 451 | int bsp_apic_id; |
| 452 | |
| 453 | KKASSERT(madt_phyaddr != 0); |
| 454 | |
| 455 | lapic_addr = madt_lapic_pass1(); |
| 456 | if (lapic_addr == 0) |
| 457 | panic("madt_lapic_enumerate: no local apic\n"); |
| 458 | |
| 459 | lapic_map(lapic_addr); |
| 460 | |
| 461 | bsp_apic_id = APIC_ID(lapic->id); |
| 462 | if (madt_lapic_pass2(bsp_apic_id)) |
| 463 | panic("madt_lapic_enumerate: madt_lapic_pass2 failed\n"); |
| 464 | } |
| 465 | |
| 466 | static 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 |
| 470 | }; |
| 471 | |
| 472 | static void |
| 473 | madt_lapic_enum_register(void) |
| 474 | { |
| 475 | int prio; |
| 476 | |
| 477 | prio = LAPIC_ENUM_PRIO_MADT; |
| 478 | kgetenv_int("hw.madt_lapic_prio", &prio); |
| 479 | madt_lapic_enumerator.lapic_prio = prio; |
| 480 | |
| 481 | lapic_enumerator_register(&madt_lapic_enumerator); |
| 482 | } |
| 483 | SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0); |
| 484 | |
| 485 | struct madt_ioapic_probe_cbarg { |
| 486 | int ioapic_cnt; |
| 487 | int gsi_base0; |
| 488 | }; |
| 489 | |
| 490 | static int |
| 491 | madt_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 | |
| 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 | |
| 508 | if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) { |
| 509 | kprintf("ACPI MADT: warning intsrc irq %d " |
| 510 | "bus is not ISA (%d)\n", |
| 511 | intsrc_ent->mint_src, intsrc_ent->mint_bus); |
| 512 | } |
| 513 | |
| 514 | trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >> |
| 515 | MADT_INT_TRIG_SHIFT; |
| 516 | if (trig == MADT_INT_TRIG_RSVD) { |
| 517 | kprintf("ACPI MADT: warning invalid intsrc irq %d " |
| 518 | "trig (%d)\n", intsrc_ent->mint_src, trig); |
| 519 | } |
| 520 | |
| 521 | pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >> |
| 522 | MADT_INT_POLA_SHIFT; |
| 523 | if (pola == MADT_INT_POLA_RSVD) { |
| 524 | kprintf("ACPI MADT: warning invalid intsrc irq %d " |
| 525 | "pola (%d)\n", intsrc_ent->mint_src, pola); |
| 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 | |
| 543 | static int |
| 544 | madt_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 | |
| 553 | madt = sdt_sdth_map(madt_phyaddr); |
| 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 | |
| 570 | sdt_sdth_unmap(&madt->madt_hdr); |
| 571 | return error; |
| 572 | } |
| 573 | |
| 574 | static int |
| 575 | madt_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; |
| 579 | enum intr_trigger trig; |
| 580 | enum intr_polarity pola; |
| 581 | int ent_trig; |
| 582 | |
| 583 | intsrc_ent = (const struct acpi_madt_intsrc *)ent; |
| 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) { |
| 592 | return 0; |
| 593 | #ifdef notyet |
| 594 | } else if (ent_trig == MADT_INT_TRIG_LEVEL) { |
| 595 | trig = INTR_TRIGGER_LEVEL; |
| 596 | pola = INTR_POLARITY_LOW; |
| 597 | #endif |
| 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 | } |
| 608 | |
| 609 | MADT_VPRINTF("INTSRC irq %d -> gsi %u %s/%s\n", |
| 610 | intsrc_ent->mint_src, intsrc_ent->mint_gsi, |
| 611 | intr_str_trigger(trig), intr_str_polarity(pola)); |
| 612 | ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi, |
| 613 | trig, pola); |
| 614 | } else if (ent->me_type == MADT_ENT_IOAPIC) { |
| 615 | const struct acpi_madt_ioapic *ioapic_ent; |
| 616 | uint32_t ver; |
| 617 | void *addr; |
| 618 | int npin; |
| 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); |
| 624 | |
| 625 | addr = ioapic_map(ioapic_ent->mio_addr); |
| 626 | |
| 627 | ver = ioapic_read(addr, IOAPIC_VER); |
| 628 | npin = ((ver & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) + 1; |
| 629 | |
| 630 | ioapic_add(addr, ioapic_ent->mio_gsi_base, npin); |
| 631 | } |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | static void |
| 636 | madt_ioapic_enumerate(struct ioapic_enumerator *e) |
| 637 | { |
| 638 | struct acpi_madt *madt; |
| 639 | int error; |
| 640 | |
| 641 | KKASSERT(madt_phyaddr != 0); |
| 642 | |
| 643 | madt = sdt_sdth_map(madt_phyaddr); |
| 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 | |
| 650 | sdt_sdth_unmap(&madt->madt_hdr); |
| 651 | } |
| 652 | |
| 653 | static 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 | |
| 659 | static void |
| 660 | madt_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 | } |
| 670 | SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, |
| 671 | madt_ioapic_enum_register, 0); |