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sys/i386/i386/io_apic.c
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1 /*- 2 * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD: releng/5.3/sys/i386/i386/io_apic.c 133017 2004-08-02 15:31:10Z scottl $"); 32 33 #include "opt_isa.h" 34 #include "opt_no_mixed_mode.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/bus.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 44 #include <vm/vm.h> 45 #include <vm/pmap.h> 46 47 #include <machine/apicreg.h> 48 #include <machine/frame.h> 49 #include <machine/intr_machdep.h> 50 #include <machine/apicvar.h> 51 #include <machine/segments.h> 52 53 #define IOAPIC_ISA_INTS 16 54 #define IOAPIC_MEM_REGION 32 55 #define IOAPIC_REDTBL_LO(i) (IOAPIC_REDTBL + (i) * 2) 56 #define IOAPIC_REDTBL_HI(i) (IOAPIC_REDTBL_LO(i) + 1) 57 58 #define VECTOR_EXTINT 252 59 #define VECTOR_NMI 253 60 #define VECTOR_SMI 254 61 #define VECTOR_DISABLED 255 62 63 #define DEST_NONE -1 64 #define DEST_EXTINT -2 65 66 #define TODO printf("%s: not implemented!\n", __func__) 67 68 MALLOC_DEFINE(M_IOAPIC, "I/O APIC", "I/O APIC structures"); 69 70 /* 71 * New interrupt support code.. 72 * 73 * XXX: we really should have the interrupt cookie passed up from new-bus 74 * just be a int pin, and not map 1:1 to interrupt vector number but should 75 * use INTR_TYPE_FOO to set priority bands for device classes and do all the 76 * magic remapping of intpin to vector in here. For now we just cheat as on 77 * ia64 and map intpin X to vector NRSVIDT + X. Note that we assume that the 78 * first IO APIC has ISA interrupts on pins 1-15. Not sure how you are 79 * really supposed to figure out which IO APIC in a system with multiple IO 80 * APIC's actually has the ISA interrupts routed to it. As far as interrupt 81 * pin numbers, we use the ACPI System Interrupt number model where each 82 * IO APIC has a contiguous chunk of the System Interrupt address space. 83 */ 84 85 /* 86 * Direct the ExtINT pin on the first I/O APIC to a logical cluster of 87 * CPUs rather than a physical destination of just the BSP. 88 * 89 * Note: This is disabled by default as test systems seem to croak with it 90 * enabled. 91 #define ENABLE_EXTINT_LOGICAL_DESTINATION 92 */ 93 94 struct ioapic_intsrc { 95 struct intsrc io_intsrc; 96 u_int io_intpin:8; 97 u_int io_vector:8; 98 u_int io_activehi:1; 99 u_int io_edgetrigger:1; 100 u_int io_masked:1; 101 int io_dest:5; 102 int io_bus:4; 103 }; 104 105 struct ioapic { 106 struct pic io_pic; 107 u_int io_id:8; /* logical ID */ 108 u_int io_apic_id:4; 109 u_int io_intbase:8; /* System Interrupt base */ 110 u_int io_numintr:8; 111 volatile ioapic_t *io_addr; /* XXX: should use bus_space */ 112 STAILQ_ENTRY(ioapic) io_next; 113 struct ioapic_intsrc io_pins[0]; 114 }; 115 116 static u_int ioapic_read(volatile ioapic_t *apic, int reg); 117 static void ioapic_write(volatile ioapic_t *apic, int reg, u_int val); 118 static const char *ioapic_bus_string(int bus_type); 119 static void ioapic_print_vector(struct ioapic_intsrc *intpin); 120 static void ioapic_enable_source(struct intsrc *isrc); 121 static void ioapic_disable_source(struct intsrc *isrc, int eoi); 122 static void ioapic_eoi_source(struct intsrc *isrc); 123 static void ioapic_enable_intr(struct intsrc *isrc); 124 static int ioapic_vector(struct intsrc *isrc); 125 static int ioapic_source_pending(struct intsrc *isrc); 126 static int ioapic_config_intr(struct intsrc *isrc, enum intr_trigger trig, 127 enum intr_polarity pol); 128 static void ioapic_suspend(struct intsrc *isrc); 129 static void ioapic_resume(struct intsrc *isrc); 130 static void ioapic_program_destination(struct ioapic_intsrc *intpin); 131 static void ioapic_program_intpin(struct ioapic_intsrc *intpin); 132 static void ioapic_setup_mixed_mode(struct ioapic_intsrc *intpin); 133 134 static STAILQ_HEAD(,ioapic) ioapic_list = STAILQ_HEAD_INITIALIZER(ioapic_list); 135 struct pic ioapic_template = { ioapic_enable_source, ioapic_disable_source, 136 ioapic_eoi_source, ioapic_enable_intr, 137 ioapic_vector, ioapic_source_pending, 138 ioapic_suspend, ioapic_resume, 139 ioapic_config_intr }; 140 141 static int bsp_id, current_cluster, logical_clusters, next_ioapic_base; 142 static u_int mixed_mode_enabled, next_id, program_logical_dest; 143 #ifdef NO_MIXED_MODE 144 static int mixed_mode_active = 0; 145 #else 146 static int mixed_mode_active = 1; 147 #endif 148 TUNABLE_INT("hw.apic.mixed_mode", &mixed_mode_active); 149 150 static __inline void 151 _ioapic_eoi_source(struct intsrc *isrc) 152 { 153 lapic_eoi(); 154 } 155 156 static u_int 157 ioapic_read(volatile ioapic_t *apic, int reg) 158 { 159 160 mtx_assert(&icu_lock, MA_OWNED); 161 apic->ioregsel = reg; 162 return (apic->iowin); 163 } 164 165 static void 166 ioapic_write(volatile ioapic_t *apic, int reg, u_int val) 167 { 168 169 mtx_assert(&icu_lock, MA_OWNED); 170 apic->ioregsel = reg; 171 apic->iowin = val; 172 } 173 174 static const char * 175 ioapic_bus_string(int bus_type) 176 { 177 178 switch (bus_type) { 179 case APIC_BUS_ISA: 180 return ("ISA"); 181 case APIC_BUS_EISA: 182 return ("EISA"); 183 case APIC_BUS_PCI: 184 return ("PCI"); 185 default: 186 return ("unknown"); 187 } 188 } 189 190 static void 191 ioapic_print_vector(struct ioapic_intsrc *intpin) 192 { 193 194 switch (intpin->io_vector) { 195 case VECTOR_DISABLED: 196 printf("disabled"); 197 break; 198 case VECTOR_EXTINT: 199 printf("ExtINT"); 200 break; 201 case VECTOR_NMI: 202 printf("NMI"); 203 break; 204 case VECTOR_SMI: 205 printf("SMI"); 206 break; 207 default: 208 printf("%s IRQ %u", ioapic_bus_string(intpin->io_bus), 209 intpin->io_vector); 210 } 211 } 212 213 static void 214 ioapic_enable_source(struct intsrc *isrc) 215 { 216 struct ioapic_intsrc *intpin = (struct ioapic_intsrc *)isrc; 217 struct ioapic *io = (struct ioapic *)isrc->is_pic; 218 uint32_t flags; 219 220 mtx_lock_spin(&icu_lock); 221 if (intpin->io_masked) { 222 flags = ioapic_read(io->io_addr, 223 IOAPIC_REDTBL_LO(intpin->io_intpin)); 224 flags &= ~(IOART_INTMASK); 225 ioapic_write(io->io_addr, IOAPIC_REDTBL_LO(intpin->io_intpin), 226 flags); 227 intpin->io_masked = 0; 228 } 229 mtx_unlock_spin(&icu_lock); 230 } 231 232 static void 233 ioapic_disable_source(struct intsrc *isrc, int eoi) 234 { 235 struct ioapic_intsrc *intpin = (struct ioapic_intsrc *)isrc; 236 struct ioapic *io = (struct ioapic *)isrc->is_pic; 237 uint32_t flags; 238 239 mtx_lock_spin(&icu_lock); 240 if (!intpin->io_masked && !intpin->io_edgetrigger) { 241 flags = ioapic_read(io->io_addr, 242 IOAPIC_REDTBL_LO(intpin->io_intpin)); 243 flags |= IOART_INTMSET; 244 ioapic_write(io->io_addr, IOAPIC_REDTBL_LO(intpin->io_intpin), 245 flags); 246 intpin->io_masked = 1; 247 } 248 249 if (eoi == PIC_EOI) 250 _ioapic_eoi_source(isrc); 251 252 mtx_unlock_spin(&icu_lock); 253 } 254 255 static void 256 ioapic_eoi_source(struct intsrc *isrc) 257 { 258 259 _ioapic_eoi_source(isrc); 260 } 261 262 /* 263 * Completely program an intpin based on the data in its interrupt source 264 * structure. 265 */ 266 static void 267 ioapic_program_intpin(struct ioapic_intsrc *intpin) 268 { 269 struct ioapic *io = (struct ioapic *)intpin->io_intsrc.is_pic; 270 uint32_t low, high, value; 271 272 /* 273 * For pins routed via mixed mode or disabled, just ensure that 274 * they are masked. 275 */ 276 if (intpin->io_dest == DEST_EXTINT || 277 intpin->io_vector == VECTOR_DISABLED) { 278 low = ioapic_read(io->io_addr, 279 IOAPIC_REDTBL_LO(intpin->io_intpin)); 280 if ((low & IOART_INTMASK) == IOART_INTMCLR) 281 ioapic_write(io->io_addr, 282 IOAPIC_REDTBL_LO(intpin->io_intpin), 283 low | IOART_INTMSET); 284 return; 285 } 286 287 /* Set the destination. */ 288 if (intpin->io_dest == DEST_NONE) { 289 low = IOART_DESTPHY; 290 high = bsp_id << APIC_ID_SHIFT; 291 } else { 292 low = IOART_DESTLOG; 293 high = (intpin->io_dest << APIC_ID_CLUSTER_SHIFT | 294 APIC_ID_CLUSTER_ID) << APIC_ID_SHIFT; 295 } 296 297 /* Program the rest of the low word. */ 298 if (intpin->io_edgetrigger) 299 low |= IOART_TRGREDG; 300 else 301 low |= IOART_TRGRLVL; 302 if (intpin->io_activehi) 303 low |= IOART_INTAHI; 304 else 305 low |= IOART_INTALO; 306 if (intpin->io_masked) 307 low |= IOART_INTMSET; 308 switch (intpin->io_vector) { 309 case VECTOR_EXTINT: 310 KASSERT(intpin->io_edgetrigger, 311 ("EXTINT not edge triggered")); 312 low |= IOART_DELEXINT; 313 break; 314 case VECTOR_NMI: 315 KASSERT(intpin->io_edgetrigger, 316 ("NMI not edge triggered")); 317 low |= IOART_DELNMI; 318 break; 319 case VECTOR_SMI: 320 KASSERT(intpin->io_edgetrigger, 321 ("SMI not edge triggered")); 322 low |= IOART_DELSMI; 323 break; 324 default: 325 low |= IOART_DELLOPRI | apic_irq_to_idt(intpin->io_vector); 326 } 327 328 /* Write the values to the APIC. */ 329 mtx_lock_spin(&icu_lock); 330 ioapic_write(io->io_addr, IOAPIC_REDTBL_LO(intpin->io_intpin), low); 331 value = ioapic_read(io->io_addr, IOAPIC_REDTBL_HI(intpin->io_intpin)); 332 value &= ~IOART_DEST; 333 value |= high; 334 ioapic_write(io->io_addr, IOAPIC_REDTBL_HI(intpin->io_intpin), value); 335 mtx_unlock_spin(&icu_lock); 336 } 337 338 /* 339 * Program an individual intpin's logical destination. 340 */ 341 static void 342 ioapic_program_destination(struct ioapic_intsrc *intpin) 343 { 344 struct ioapic *io = (struct ioapic *)intpin->io_intsrc.is_pic; 345 346 KASSERT(intpin->io_dest != DEST_NONE, 347 ("intpin not assigned to a cluster")); 348 KASSERT(intpin->io_dest != DEST_EXTINT, 349 ("intpin routed via ExtINT")); 350 if (bootverbose) { 351 printf("ioapic%u: routing intpin %u (", io->io_id, 352 intpin->io_intpin); 353 ioapic_print_vector(intpin); 354 printf(") to cluster %u\n", intpin->io_dest); 355 } 356 ioapic_program_intpin(intpin); 357 } 358 359 static void 360 ioapic_assign_cluster(struct ioapic_intsrc *intpin) 361 { 362 363 /* 364 * Assign this intpin to a logical APIC cluster in a 365 * round-robin fashion. We don't actually use the logical 366 * destination for this intpin until after all the CPU's 367 * have been started so that we don't end up with interrupts 368 * that don't go anywhere. Another alternative might be to 369 * start up the CPU's earlier so that they can handle interrupts 370 * sooner. 371 */ 372 intpin->io_dest = current_cluster; 373 current_cluster++; 374 if (current_cluster >= logical_clusters) 375 current_cluster = 0; 376 if (program_logical_dest) 377 ioapic_program_destination(intpin); 378 } 379 380 static void 381 ioapic_enable_intr(struct intsrc *isrc) 382 { 383 struct ioapic_intsrc *intpin = (struct ioapic_intsrc *)isrc; 384 385 KASSERT(intpin->io_dest != DEST_EXTINT, 386 ("ExtINT pin trying to use ioapic enable_intr method")); 387 if (intpin->io_dest == DEST_NONE) { 388 ioapic_assign_cluster(intpin); 389 lapic_enable_intr(intpin->io_vector); 390 } 391 } 392 393 static int 394 ioapic_vector(struct intsrc *isrc) 395 { 396 struct ioapic_intsrc *pin; 397 398 pin = (struct ioapic_intsrc *)isrc; 399 return (pin->io_vector); 400 } 401 402 static int 403 ioapic_source_pending(struct intsrc *isrc) 404 { 405 struct ioapic_intsrc *intpin = (struct ioapic_intsrc *)isrc; 406 407 return (lapic_intr_pending(intpin->io_vector)); 408 } 409 410 static int 411 ioapic_config_intr(struct intsrc *isrc, enum intr_trigger trig, 412 enum intr_polarity pol) 413 { 414 struct ioapic_intsrc *intpin = (struct ioapic_intsrc *)isrc; 415 struct ioapic *io = (struct ioapic *)isrc->is_pic; 416 int changed; 417 418 KASSERT(!(trig == INTR_TRIGGER_CONFORM || pol == INTR_POLARITY_CONFORM), 419 ("%s: Conforming trigger or polarity\n", __func__)); 420 421 /* 422 * EISA interrupts always use active high polarity, so don't allow 423 * them to be set to active low. 424 * 425 * XXX: Should we write to the ELCR if the trigger mode changes for 426 * an EISA IRQ? 427 */ 428 if (intpin->io_bus == APIC_BUS_EISA) 429 pol = INTR_POLARITY_HIGH; 430 changed = 0; 431 if (intpin->io_edgetrigger != (trig == INTR_TRIGGER_EDGE)) { 432 if (bootverbose) 433 printf("ioapic%u: Changing trigger for pin %u to %s\n", 434 io->io_id, intpin->io_intpin, 435 trig == INTR_TRIGGER_EDGE ? "edge" : "level"); 436 intpin->io_edgetrigger = (trig == INTR_TRIGGER_EDGE); 437 changed++; 438 } 439 if (intpin->io_activehi != (pol == INTR_POLARITY_HIGH)) { 440 if (bootverbose) 441 printf("ioapic%u: Changing polarity for pin %u to %s\n", 442 io->io_id, intpin->io_intpin, 443 pol == INTR_POLARITY_HIGH ? "high" : "low"); 444 intpin->io_activehi = (pol == INTR_POLARITY_HIGH); 445 changed++; 446 } 447 if (changed) 448 ioapic_program_intpin(intpin); 449 return (0); 450 } 451 452 static void 453 ioapic_suspend(struct intsrc *isrc) 454 { 455 456 TODO; 457 } 458 459 static void 460 ioapic_resume(struct intsrc *isrc) 461 { 462 463 ioapic_program_intpin((struct ioapic_intsrc *)isrc); 464 } 465 466 /* 467 * APIC enumerators call this function to indicate that the 8259A AT PICs 468 * are available and that mixed mode can be used. 469 */ 470 void 471 ioapic_enable_mixed_mode(void) 472 { 473 474 mixed_mode_enabled = 1; 475 } 476 477 /* 478 * Allocate and return a logical cluster ID. Note that the first time 479 * this is called, it returns cluster 0. ioapic_enable_intr() treats 480 * the two cases of logical_clusters == 0 and logical_clusters == 1 the 481 * same: one cluster of ID 0 exists. The logical_clusters == 0 case is 482 * for UP kernels, which should never call this function. 483 */ 484 int 485 ioapic_next_logical_cluster(void) 486 { 487 488 if (logical_clusters >= APIC_MAX_CLUSTER) 489 panic("WARNING: Local APIC cluster IDs exhausted!"); 490 return (logical_clusters++); 491 } 492 493 /* 494 * Create a plain I/O APIC object. 495 */ 496 void * 497 ioapic_create(uintptr_t addr, int32_t apic_id, int intbase) 498 { 499 struct ioapic *io; 500 struct ioapic_intsrc *intpin; 501 volatile ioapic_t *apic; 502 u_int numintr, i; 503 uint32_t value; 504 505 apic = (ioapic_t *)pmap_mapdev(addr, IOAPIC_MEM_REGION); 506 mtx_lock_spin(&icu_lock); 507 numintr = ((ioapic_read(apic, IOAPIC_VER) & IOART_VER_MAXREDIR) >> 508 MAXREDIRSHIFT) + 1; 509 mtx_unlock_spin(&icu_lock); 510 io = malloc(sizeof(struct ioapic) + 511 numintr * sizeof(struct ioapic_intsrc), M_IOAPIC, M_WAITOK); 512 io->io_pic = ioapic_template; 513 mtx_lock_spin(&icu_lock); 514 io->io_id = next_id++; 515 io->io_apic_id = ioapic_read(apic, IOAPIC_ID) >> APIC_ID_SHIFT; 516 if (apic_id != -1 && io->io_apic_id != apic_id) { 517 ioapic_write(apic, IOAPIC_ID, apic_id << APIC_ID_SHIFT); 518 mtx_unlock_spin(&icu_lock); 519 io->io_apic_id = apic_id; 520 printf("ioapic%u: Changing APIC ID to %d\n", io->io_id, 521 apic_id); 522 } else 523 mtx_unlock_spin(&icu_lock); 524 if (intbase == -1) { 525 intbase = next_ioapic_base; 526 printf("ioapic%u: Assuming intbase of %d\n", io->io_id, 527 intbase); 528 } else if (intbase != next_ioapic_base) 529 printf("ioapic%u: WARNING: intbase %d != expected base %d\n", 530 io->io_id, intbase, next_ioapic_base); 531 io->io_intbase = intbase; 532 next_ioapic_base = intbase + numintr; 533 io->io_numintr = numintr; 534 io->io_addr = apic; 535 536 /* 537 * Initialize pins. Start off with interrupts disabled. Default 538 * to active-hi and edge-triggered for ISA interrupts and active-lo 539 * and level-triggered for all others. 540 */ 541 bzero(io->io_pins, sizeof(struct ioapic_intsrc) * numintr); 542 mtx_lock_spin(&icu_lock); 543 for (i = 0, intpin = io->io_pins; i < numintr; i++, intpin++) { 544 intpin->io_intsrc.is_pic = (struct pic *)io; 545 intpin->io_intpin = i; 546 intpin->io_vector = intbase + i; 547 548 /* 549 * Assume that pin 0 on the first I/O APIC is an ExtINT pin 550 * and that pins 1-15 are ISA interrupts. Assume that all 551 * other pins are PCI interrupts. 552 */ 553 if (intpin->io_vector == 0) 554 ioapic_set_extint(io, i); 555 else if (intpin->io_vector < IOAPIC_ISA_INTS) { 556 intpin->io_bus = APIC_BUS_ISA; 557 intpin->io_activehi = 1; 558 intpin->io_edgetrigger = 1; 559 intpin->io_masked = 1; 560 } else { 561 intpin->io_bus = APIC_BUS_PCI; 562 intpin->io_activehi = 0; 563 intpin->io_edgetrigger = 0; 564 intpin->io_masked = 1; 565 } 566 567 /* 568 * Route interrupts to the BSP by default using physical 569 * addressing. Vectored interrupts get readdressed using 570 * logical IDs to CPU clusters when they are enabled. 571 */ 572 intpin->io_dest = DEST_NONE; 573 if (bootverbose && intpin->io_vector != VECTOR_DISABLED) { 574 printf("ioapic%u: intpin %d -> ", io->io_id, i); 575 ioapic_print_vector(intpin); 576 printf(" (%s, %s)\n", intpin->io_edgetrigger ? 577 "edge" : "level", intpin->io_activehi ? "high" : 578 "low"); 579 } 580 value = ioapic_read(apic, IOAPIC_REDTBL_LO(i)); 581 ioapic_write(apic, IOAPIC_REDTBL_LO(i), value | IOART_INTMSET); 582 } 583 mtx_unlock_spin(&icu_lock); 584 585 return (io); 586 } 587 588 int 589 ioapic_get_vector(void *cookie, u_int pin) 590 { 591 struct ioapic *io; 592 593 io = (struct ioapic *)cookie; 594 if (pin >= io->io_numintr) 595 return (-1); 596 return (io->io_pins[pin].io_vector); 597 } 598 599 int 600 ioapic_disable_pin(void *cookie, u_int pin) 601 { 602 struct ioapic *io; 603 604 io = (struct ioapic *)cookie; 605 if (pin >= io->io_numintr) 606 return (EINVAL); 607 if (io->io_pins[pin].io_vector == VECTOR_DISABLED) 608 return (EINVAL); 609 io->io_pins[pin].io_vector = VECTOR_DISABLED; 610 if (bootverbose) 611 printf("ioapic%u: intpin %d disabled\n", io->io_id, pin); 612 return (0); 613 } 614 615 int 616 ioapic_remap_vector(void *cookie, u_int pin, int vector) 617 { 618 struct ioapic *io; 619 620 io = (struct ioapic *)cookie; 621 if (pin >= io->io_numintr || vector < 0) 622 return (EINVAL); 623 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 624 return (EINVAL); 625 io->io_pins[pin].io_vector = vector; 626 if (bootverbose) 627 printf("ioapic%u: Routing IRQ %d -> intpin %d\n", io->io_id, 628 vector, pin); 629 return (0); 630 } 631 632 int 633 ioapic_set_bus(void *cookie, u_int pin, int bus_type) 634 { 635 struct ioapic *io; 636 637 if (bus_type < 0 || bus_type > APIC_BUS_MAX) 638 return (EINVAL); 639 io = (struct ioapic *)cookie; 640 if (pin >= io->io_numintr) 641 return (EINVAL); 642 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 643 return (EINVAL); 644 io->io_pins[pin].io_bus = bus_type; 645 if (bootverbose) 646 printf("ioapic%u: intpin %d bus %s\n", io->io_id, pin, 647 ioapic_bus_string(bus_type)); 648 return (0); 649 } 650 651 int 652 ioapic_set_nmi(void *cookie, u_int pin) 653 { 654 struct ioapic *io; 655 656 io = (struct ioapic *)cookie; 657 if (pin >= io->io_numintr) 658 return (EINVAL); 659 if (io->io_pins[pin].io_vector == VECTOR_NMI) 660 return (0); 661 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 662 return (EINVAL); 663 io->io_pins[pin].io_bus = APIC_BUS_UNKNOWN; 664 io->io_pins[pin].io_vector = VECTOR_NMI; 665 io->io_pins[pin].io_masked = 0; 666 io->io_pins[pin].io_edgetrigger = 1; 667 io->io_pins[pin].io_activehi = 1; 668 if (bootverbose) 669 printf("ioapic%u: Routing NMI -> intpin %d\n", 670 io->io_id, pin); 671 return (0); 672 } 673 674 int 675 ioapic_set_smi(void *cookie, u_int pin) 676 { 677 struct ioapic *io; 678 679 io = (struct ioapic *)cookie; 680 if (pin >= io->io_numintr) 681 return (EINVAL); 682 if (io->io_pins[pin].io_vector == VECTOR_SMI) 683 return (0); 684 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 685 return (EINVAL); 686 io->io_pins[pin].io_bus = APIC_BUS_UNKNOWN; 687 io->io_pins[pin].io_vector = VECTOR_SMI; 688 io->io_pins[pin].io_masked = 0; 689 io->io_pins[pin].io_edgetrigger = 1; 690 io->io_pins[pin].io_activehi = 1; 691 if (bootverbose) 692 printf("ioapic%u: Routing SMI -> intpin %d\n", 693 io->io_id, pin); 694 return (0); 695 } 696 697 int 698 ioapic_set_extint(void *cookie, u_int pin) 699 { 700 struct ioapic *io; 701 702 io = (struct ioapic *)cookie; 703 if (pin >= io->io_numintr) 704 return (EINVAL); 705 if (io->io_pins[pin].io_vector == VECTOR_EXTINT) 706 return (0); 707 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 708 return (EINVAL); 709 io->io_pins[pin].io_bus = APIC_BUS_UNKNOWN; 710 io->io_pins[pin].io_vector = VECTOR_EXTINT; 711 712 /* Enable this pin if mixed mode is available and active. */ 713 if (mixed_mode_enabled && mixed_mode_active) 714 io->io_pins[pin].io_masked = 0; 715 else 716 io->io_pins[pin].io_masked = 1; 717 io->io_pins[pin].io_edgetrigger = 1; 718 io->io_pins[pin].io_activehi = 1; 719 if (bootverbose) 720 printf("ioapic%u: Routing external 8259A's -> intpin %d\n", 721 io->io_id, pin); 722 return (0); 723 } 724 725 int 726 ioapic_set_polarity(void *cookie, u_int pin, enum intr_polarity pol) 727 { 728 struct ioapic *io; 729 730 io = (struct ioapic *)cookie; 731 if (pin >= io->io_numintr || pol == INTR_POLARITY_CONFORM) 732 return (EINVAL); 733 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 734 return (EINVAL); 735 io->io_pins[pin].io_activehi = (pol == INTR_POLARITY_HIGH); 736 if (bootverbose) 737 printf("ioapic%u: intpin %d polarity: %s\n", io->io_id, pin, 738 pol == INTR_POLARITY_HIGH ? "high" : "low"); 739 return (0); 740 } 741 742 int 743 ioapic_set_triggermode(void *cookie, u_int pin, enum intr_trigger trigger) 744 { 745 struct ioapic *io; 746 747 io = (struct ioapic *)cookie; 748 if (pin >= io->io_numintr || trigger == INTR_TRIGGER_CONFORM) 749 return (EINVAL); 750 if (io->io_pins[pin].io_vector >= NUM_IO_INTS) 751 return (EINVAL); 752 io->io_pins[pin].io_edgetrigger = (trigger == INTR_TRIGGER_EDGE); 753 if (bootverbose) 754 printf("ioapic%u: intpin %d trigger: %s\n", io->io_id, pin, 755 trigger == INTR_TRIGGER_EDGE ? "edge" : "level"); 756 return (0); 757 } 758 759 /* 760 * Register a complete I/O APIC object with the interrupt subsystem. 761 */ 762 void 763 ioapic_register(void *cookie) 764 { 765 struct ioapic_intsrc *pin; 766 struct ioapic *io; 767 volatile ioapic_t *apic; 768 uint32_t flags; 769 int i; 770 771 io = (struct ioapic *)cookie; 772 apic = io->io_addr; 773 mtx_lock_spin(&icu_lock); 774 flags = ioapic_read(apic, IOAPIC_VER) & IOART_VER_VERSION; 775 STAILQ_INSERT_TAIL(&ioapic_list, io, io_next); 776 mtx_unlock_spin(&icu_lock); 777 printf("ioapic%u <Version %u.%u> irqs %u-%u on motherboard\n", 778 io->io_id, flags >> 4, flags & 0xf, io->io_intbase, 779 io->io_intbase + io->io_numintr - 1); 780 bsp_id = PCPU_GET(apic_id); 781 for (i = 0, pin = io->io_pins; i < io->io_numintr; i++, pin++) { 782 /* 783 * Finish initializing the pins by programming the vectors 784 * and delivery mode. 785 */ 786 if (pin->io_vector == VECTOR_DISABLED) 787 continue; 788 ioapic_program_intpin(pin); 789 if (pin->io_vector >= NUM_IO_INTS) 790 continue; 791 /* 792 * Route IRQ0 via the 8259A using mixed mode if mixed mode 793 * is available and turned on. 794 */ 795 if (pin->io_vector == 0 && mixed_mode_active && 796 mixed_mode_enabled) 797 ioapic_setup_mixed_mode(pin); 798 else 799 intr_register_source(&pin->io_intsrc); 800 } 801 } 802 803 /* 804 * Program all the intpins to use logical destinations once the AP's 805 * have been launched. 806 */ 807 static void 808 ioapic_set_logical_destinations(void *arg __unused) 809 { 810 struct ioapic *io; 811 int i; 812 813 program_logical_dest = 1; 814 STAILQ_FOREACH(io, &ioapic_list, io_next) 815 for (i = 0; i < io->io_numintr; i++) 816 if (io->io_pins[i].io_dest != DEST_NONE && 817 io->io_pins[i].io_dest != DEST_EXTINT) 818 ioapic_program_destination(&io->io_pins[i]); 819 } 820 SYSINIT(ioapic_destinations, SI_SUB_SMP, SI_ORDER_SECOND, 821 ioapic_set_logical_destinations, NULL) 822 823 /* 824 * Support for mixed-mode interrupt sources. These sources route an ISA 825 * IRQ through the 8259A's via the ExtINT on pin 0 of the I/O APIC that 826 * routes the ISA interrupts. We just ignore the intpins that use this 827 * mode and allow the atpic driver to register its interrupt source for 828 * that IRQ instead. 829 */ 830 831 static void 832 ioapic_setup_mixed_mode(struct ioapic_intsrc *intpin) 833 { 834 struct ioapic_intsrc *extint; 835 struct ioapic *io; 836 837 /* 838 * Mark the associated I/O APIC intpin as being delivered via 839 * ExtINT and enable the ExtINT pin on the I/O APIC if needed. 840 */ 841 intpin->io_dest = DEST_EXTINT; 842 io = (struct ioapic *)intpin->io_intsrc.is_pic; 843 extint = &io->io_pins[0]; 844 if (extint->io_vector != VECTOR_EXTINT) 845 panic("Can't find ExtINT pin to route through!"); 846 #ifdef ENABLE_EXTINT_LOGICAL_DESTINATION 847 if (extint->io_dest == DEST_NONE) 848 ioapic_assign_cluster(extint); 849 #endif 850 }
Cache object: c481e87d6bbae7745a462b9265eb31ef
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