interrupts.cc revision 9557:8666e81607a6
1/* 2 * Copyright (c) 2012-2013 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2008 The Hewlett-Packard Development Company 15 * All rights reserved. 16 * 17 * The license below extends only to copyright in the software and shall 18 * not be construed as granting a license to any other intellectual 19 * property including but not limited to intellectual property relating 20 * to a hardware implementation of the functionality of the software 21 * licensed hereunder. You may use the software subject to the license 22 * terms below provided that you ensure that this notice is replicated 23 * unmodified and in its entirety in all distributions of the software, 24 * modified or unmodified, in source code or in binary form. 25 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions are 28 * met: redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer; 30 * redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution; 33 * neither the name of the copyright holders nor the names of its 34 * contributors may be used to endorse or promote products derived from 35 * this software without specific prior written permission. 36 * 37 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 38 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 39 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 40 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 41 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 44 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 45 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 48 * 49 * Authors: Gabe Black 50 */ 51 52#include "arch/x86/regs/apic.hh" 53#include "arch/x86/interrupts.hh" 54#include "arch/x86/intmessage.hh" 55#include "cpu/base.hh" 56#include "debug/LocalApic.hh" 57#include "dev/x86/i82094aa.hh" 58#include "dev/x86/pc.hh" 59#include "dev/x86/south_bridge.hh" 60#include "mem/packet_access.hh" 61#include "sim/system.hh" 62#include "sim/full_system.hh" 63 64int 65divideFromConf(uint32_t conf) 66{ 67 // This figures out what division we want from the division configuration 68 // register in the local APIC. The encoding is a little odd but it can 69 // be deciphered fairly easily. 70 int shift = ((conf & 0x8) >> 1) | (conf & 0x3); 71 shift = (shift + 1) % 8; 72 return 1 << shift; 73} 74 75namespace X86ISA 76{ 77 78ApicRegIndex 79decodeAddr(Addr paddr) 80{ 81 ApicRegIndex regNum; 82 paddr &= ~mask(3); 83 switch (paddr) 84 { 85 case 0x20: 86 regNum = APIC_ID; 87 break; 88 case 0x30: 89 regNum = APIC_VERSION; 90 break; 91 case 0x80: 92 regNum = APIC_TASK_PRIORITY; 93 break; 94 case 0x90: 95 regNum = APIC_ARBITRATION_PRIORITY; 96 break; 97 case 0xA0: 98 regNum = APIC_PROCESSOR_PRIORITY; 99 break; 100 case 0xB0: 101 regNum = APIC_EOI; 102 break; 103 case 0xD0: 104 regNum = APIC_LOGICAL_DESTINATION; 105 break; 106 case 0xE0: 107 regNum = APIC_DESTINATION_FORMAT; 108 break; 109 case 0xF0: 110 regNum = APIC_SPURIOUS_INTERRUPT_VECTOR; 111 break; 112 case 0x100: 113 case 0x108: 114 case 0x110: 115 case 0x118: 116 case 0x120: 117 case 0x128: 118 case 0x130: 119 case 0x138: 120 case 0x140: 121 case 0x148: 122 case 0x150: 123 case 0x158: 124 case 0x160: 125 case 0x168: 126 case 0x170: 127 case 0x178: 128 regNum = APIC_IN_SERVICE((paddr - 0x100) / 0x8); 129 break; 130 case 0x180: 131 case 0x188: 132 case 0x190: 133 case 0x198: 134 case 0x1A0: 135 case 0x1A8: 136 case 0x1B0: 137 case 0x1B8: 138 case 0x1C0: 139 case 0x1C8: 140 case 0x1D0: 141 case 0x1D8: 142 case 0x1E0: 143 case 0x1E8: 144 case 0x1F0: 145 case 0x1F8: 146 regNum = APIC_TRIGGER_MODE((paddr - 0x180) / 0x8); 147 break; 148 case 0x200: 149 case 0x208: 150 case 0x210: 151 case 0x218: 152 case 0x220: 153 case 0x228: 154 case 0x230: 155 case 0x238: 156 case 0x240: 157 case 0x248: 158 case 0x250: 159 case 0x258: 160 case 0x260: 161 case 0x268: 162 case 0x270: 163 case 0x278: 164 regNum = APIC_INTERRUPT_REQUEST((paddr - 0x200) / 0x8); 165 break; 166 case 0x280: 167 regNum = APIC_ERROR_STATUS; 168 break; 169 case 0x300: 170 regNum = APIC_INTERRUPT_COMMAND_LOW; 171 break; 172 case 0x310: 173 regNum = APIC_INTERRUPT_COMMAND_HIGH; 174 break; 175 case 0x320: 176 regNum = APIC_LVT_TIMER; 177 break; 178 case 0x330: 179 regNum = APIC_LVT_THERMAL_SENSOR; 180 break; 181 case 0x340: 182 regNum = APIC_LVT_PERFORMANCE_MONITORING_COUNTERS; 183 break; 184 case 0x350: 185 regNum = APIC_LVT_LINT0; 186 break; 187 case 0x360: 188 regNum = APIC_LVT_LINT1; 189 break; 190 case 0x370: 191 regNum = APIC_LVT_ERROR; 192 break; 193 case 0x380: 194 regNum = APIC_INITIAL_COUNT; 195 break; 196 case 0x390: 197 regNum = APIC_CURRENT_COUNT; 198 break; 199 case 0x3E0: 200 regNum = APIC_DIVIDE_CONFIGURATION; 201 break; 202 default: 203 // A reserved register field. 204 panic("Accessed reserved register field %#x.\n", paddr); 205 break; 206 } 207 return regNum; 208} 209} 210 211Tick 212X86ISA::Interrupts::read(PacketPtr pkt) 213{ 214 Addr offset = pkt->getAddr() - pioAddr; 215 //Make sure we're at least only accessing one register. 216 if ((offset & ~mask(3)) != ((offset + pkt->getSize()) & ~mask(3))) 217 panic("Accessed more than one register at a time in the APIC!\n"); 218 ApicRegIndex reg = decodeAddr(offset); 219 uint32_t val = htog(readReg(reg)); 220 DPRINTF(LocalApic, 221 "Reading Local APIC register %d at offset %#x as %#x.\n", 222 reg, offset, val); 223 pkt->setData(((uint8_t *)&val) + (offset & mask(3))); 224 pkt->makeAtomicResponse(); 225 return latency; 226} 227 228Tick 229X86ISA::Interrupts::write(PacketPtr pkt) 230{ 231 Addr offset = pkt->getAddr() - pioAddr; 232 //Make sure we're at least only accessing one register. 233 if ((offset & ~mask(3)) != ((offset + pkt->getSize()) & ~mask(3))) 234 panic("Accessed more than one register at a time in the APIC!\n"); 235 ApicRegIndex reg = decodeAddr(offset); 236 uint32_t val = regs[reg]; 237 pkt->writeData(((uint8_t *)&val) + (offset & mask(3))); 238 DPRINTF(LocalApic, 239 "Writing Local APIC register %d at offset %#x as %#x.\n", 240 reg, offset, gtoh(val)); 241 setReg(reg, gtoh(val)); 242 pkt->makeAtomicResponse(); 243 return latency; 244} 245void 246X86ISA::Interrupts::requestInterrupt(uint8_t vector, 247 uint8_t deliveryMode, bool level) 248{ 249 /* 250 * Fixed and lowest-priority delivery mode interrupts are handled 251 * using the IRR/ISR registers, checking against the TPR, etc. 252 * The SMI, NMI, ExtInt, INIT, etc interrupts go straight through. 253 */ 254 if (deliveryMode == DeliveryMode::Fixed || 255 deliveryMode == DeliveryMode::LowestPriority) { 256 DPRINTF(LocalApic, "Interrupt is an %s.\n", 257 DeliveryMode::names[deliveryMode]); 258 // Queue up the interrupt in the IRR. 259 if (vector > IRRV) 260 IRRV = vector; 261 if (!getRegArrayBit(APIC_INTERRUPT_REQUEST_BASE, vector)) { 262 setRegArrayBit(APIC_INTERRUPT_REQUEST_BASE, vector); 263 if (level) { 264 setRegArrayBit(APIC_TRIGGER_MODE_BASE, vector); 265 } else { 266 clearRegArrayBit(APIC_TRIGGER_MODE_BASE, vector); 267 } 268 } 269 } else if (!DeliveryMode::isReserved(deliveryMode)) { 270 DPRINTF(LocalApic, "Interrupt is an %s.\n", 271 DeliveryMode::names[deliveryMode]); 272 if (deliveryMode == DeliveryMode::SMI && !pendingSmi) { 273 pendingUnmaskableInt = pendingSmi = true; 274 smiVector = vector; 275 } else if (deliveryMode == DeliveryMode::NMI && !pendingNmi) { 276 pendingUnmaskableInt = pendingNmi = true; 277 nmiVector = vector; 278 } else if (deliveryMode == DeliveryMode::ExtInt && !pendingExtInt) { 279 pendingExtInt = true; 280 extIntVector = vector; 281 } else if (deliveryMode == DeliveryMode::INIT && !pendingInit) { 282 pendingUnmaskableInt = pendingInit = true; 283 initVector = vector; 284 } else if (deliveryMode == DeliveryMode::SIPI && 285 !pendingStartup && !startedUp) { 286 pendingUnmaskableInt = pendingStartup = true; 287 startupVector = vector; 288 } 289 } 290 if (FullSystem) 291 cpu->wakeup(); 292} 293 294 295void 296X86ISA::Interrupts::setCPU(BaseCPU * newCPU) 297{ 298 assert(newCPU); 299 if (cpu != NULL && cpu->cpuId() != newCPU->cpuId()) { 300 panic("Local APICs can't be moved between CPUs" 301 " with different IDs.\n"); 302 } 303 cpu = newCPU; 304 initialApicId = cpu->cpuId(); 305 regs[APIC_ID] = (initialApicId << 24); 306 pioAddr = x86LocalAPICAddress(initialApicId, 0); 307} 308 309 310void 311X86ISA::Interrupts::init() 312{ 313 // 314 // The local apic must register its address ranges on both its pio port 315 // via the basicpiodevice(piodevice) init() function and its int port 316 // that it inherited from IntDev. Note IntDev is not a SimObject itself. 317 // 318 BasicPioDevice::init(); 319 IntDev::init(); 320 321 // the slave port has a range so inform the connected master 322 intSlavePort.sendRangeChange(); 323} 324 325 326Tick 327X86ISA::Interrupts::recvMessage(PacketPtr pkt) 328{ 329 Addr offset = pkt->getAddr() - x86InterruptAddress(initialApicId, 0); 330 assert(pkt->cmd == MemCmd::MessageReq); 331 switch(offset) 332 { 333 case 0: 334 { 335 TriggerIntMessage message = pkt->get<TriggerIntMessage>(); 336 DPRINTF(LocalApic, 337 "Got Trigger Interrupt message with vector %#x.\n", 338 message.vector); 339 340 requestInterrupt(message.vector, 341 message.deliveryMode, message.trigger); 342 } 343 break; 344 default: 345 panic("Local apic got unknown interrupt message at offset %#x.\n", 346 offset); 347 break; 348 } 349 pkt->makeAtomicResponse(); 350 return latency; 351} 352 353 354Tick 355X86ISA::Interrupts::recvResponse(PacketPtr pkt) 356{ 357 assert(!pkt->isError()); 358 assert(pkt->cmd == MemCmd::MessageResp); 359 if (--pendingIPIs == 0) { 360 InterruptCommandRegLow low = regs[APIC_INTERRUPT_COMMAND_LOW]; 361 // Record that the ICR is now idle. 362 low.deliveryStatus = 0; 363 regs[APIC_INTERRUPT_COMMAND_LOW] = low; 364 } 365 DPRINTF(LocalApic, "ICR is now idle.\n"); 366 return 0; 367} 368 369 370AddrRangeList 371X86ISA::Interrupts::getAddrRanges() const 372{ 373 AddrRangeList ranges; 374 AddrRange range = RangeEx(x86LocalAPICAddress(initialApicId, 0), 375 x86LocalAPICAddress(initialApicId, 0) + 376 PageBytes); 377 ranges.push_back(range); 378 return ranges; 379} 380 381 382AddrRangeList 383X86ISA::Interrupts::getIntAddrRange() const 384{ 385 AddrRangeList ranges; 386 ranges.push_back(RangeEx(x86InterruptAddress(initialApicId, 0), 387 x86InterruptAddress(initialApicId, 0) + 388 PhysAddrAPICRangeSize)); 389 return ranges; 390} 391 392 393uint32_t 394X86ISA::Interrupts::readReg(ApicRegIndex reg) 395{ 396 if (reg >= APIC_TRIGGER_MODE(0) && 397 reg <= APIC_TRIGGER_MODE(15)) { 398 panic("Local APIC Trigger Mode registers are unimplemented.\n"); 399 } 400 switch (reg) { 401 case APIC_ARBITRATION_PRIORITY: 402 panic("Local APIC Arbitration Priority register unimplemented.\n"); 403 break; 404 case APIC_PROCESSOR_PRIORITY: 405 panic("Local APIC Processor Priority register unimplemented.\n"); 406 break; 407 case APIC_ERROR_STATUS: 408 regs[APIC_INTERNAL_STATE] &= ~ULL(0x1); 409 break; 410 case APIC_CURRENT_COUNT: 411 { 412 if (apicTimerEvent.scheduled()) { 413 // Compute how many m5 ticks happen per count. 414 uint64_t ticksPerCount = clockPeriod() * 415 divideFromConf(regs[APIC_DIVIDE_CONFIGURATION]); 416 // Compute how many m5 ticks are left. 417 uint64_t val = apicTimerEvent.when() - curTick(); 418 // Turn that into a count. 419 val = (val + ticksPerCount - 1) / ticksPerCount; 420 return val; 421 } else { 422 return 0; 423 } 424 } 425 default: 426 break; 427 } 428 return regs[reg]; 429} 430 431void 432X86ISA::Interrupts::setReg(ApicRegIndex reg, uint32_t val) 433{ 434 uint32_t newVal = val; 435 if (reg >= APIC_IN_SERVICE(0) && 436 reg <= APIC_IN_SERVICE(15)) { 437 panic("Local APIC In-Service registers are unimplemented.\n"); 438 } 439 if (reg >= APIC_TRIGGER_MODE(0) && 440 reg <= APIC_TRIGGER_MODE(15)) { 441 panic("Local APIC Trigger Mode registers are unimplemented.\n"); 442 } 443 if (reg >= APIC_INTERRUPT_REQUEST(0) && 444 reg <= APIC_INTERRUPT_REQUEST(15)) { 445 panic("Local APIC Interrupt Request registers " 446 "are unimplemented.\n"); 447 } 448 switch (reg) { 449 case APIC_ID: 450 newVal = val & 0xFF; 451 break; 452 case APIC_VERSION: 453 // The Local APIC Version register is read only. 454 return; 455 case APIC_TASK_PRIORITY: 456 newVal = val & 0xFF; 457 break; 458 case APIC_ARBITRATION_PRIORITY: 459 panic("Local APIC Arbitration Priority register unimplemented.\n"); 460 break; 461 case APIC_PROCESSOR_PRIORITY: 462 panic("Local APIC Processor Priority register unimplemented.\n"); 463 break; 464 case APIC_EOI: 465 // Remove the interrupt that just completed from the local apic state. 466 clearRegArrayBit(APIC_IN_SERVICE_BASE, ISRV); 467 updateISRV(); 468 return; 469 case APIC_LOGICAL_DESTINATION: 470 newVal = val & 0xFF000000; 471 break; 472 case APIC_DESTINATION_FORMAT: 473 newVal = val | 0x0FFFFFFF; 474 break; 475 case APIC_SPURIOUS_INTERRUPT_VECTOR: 476 regs[APIC_INTERNAL_STATE] &= ~ULL(1 << 1); 477 regs[APIC_INTERNAL_STATE] |= val & (1 << 8); 478 if (val & (1 << 9)) 479 warn("Focus processor checking not implemented.\n"); 480 break; 481 case APIC_ERROR_STATUS: 482 { 483 if (regs[APIC_INTERNAL_STATE] & 0x1) { 484 regs[APIC_INTERNAL_STATE] &= ~ULL(0x1); 485 newVal = 0; 486 } else { 487 regs[APIC_INTERNAL_STATE] |= ULL(0x1); 488 return; 489 } 490 491 } 492 break; 493 case APIC_INTERRUPT_COMMAND_LOW: 494 { 495 InterruptCommandRegLow low = regs[APIC_INTERRUPT_COMMAND_LOW]; 496 // Check if we're already sending an IPI. 497 if (low.deliveryStatus) { 498 newVal = low; 499 break; 500 } 501 low = val; 502 InterruptCommandRegHigh high = regs[APIC_INTERRUPT_COMMAND_HIGH]; 503 // Record that an IPI is being sent. 504 low.deliveryStatus = 1; 505 TriggerIntMessage message = 0; 506 message.destination = high.destination; 507 message.vector = low.vector; 508 message.deliveryMode = low.deliveryMode; 509 message.destMode = low.destMode; 510 message.level = low.level; 511 message.trigger = low.trigger; 512 bool timing(sys->isTimingMode()); 513 // Be careful no updates of the delivery status bit get lost. 514 regs[APIC_INTERRUPT_COMMAND_LOW] = low; 515 ApicList apics; 516 int numContexts = sys->numContexts(); 517 switch (low.destShorthand) { 518 case 0: 519 if (message.deliveryMode == DeliveryMode::LowestPriority) { 520 panic("Lowest priority delivery mode " 521 "IPIs aren't implemented.\n"); 522 } 523 if (message.destMode == 1) { 524 int dest = message.destination; 525 hack_once("Assuming logical destinations are 1 << id.\n"); 526 for (int i = 0; i < numContexts; i++) { 527 if (dest & 0x1) 528 apics.push_back(i); 529 dest = dest >> 1; 530 } 531 } else { 532 if (message.destination == 0xFF) { 533 for (int i = 0; i < numContexts; i++) { 534 if (i == initialApicId) { 535 requestInterrupt(message.vector, 536 message.deliveryMode, message.trigger); 537 } else { 538 apics.push_back(i); 539 } 540 } 541 } else { 542 if (message.destination == initialApicId) { 543 requestInterrupt(message.vector, 544 message.deliveryMode, message.trigger); 545 } else { 546 apics.push_back(message.destination); 547 } 548 } 549 } 550 break; 551 case 1: 552 newVal = val; 553 requestInterrupt(message.vector, 554 message.deliveryMode, message.trigger); 555 break; 556 case 2: 557 requestInterrupt(message.vector, 558 message.deliveryMode, message.trigger); 559 // Fall through 560 case 3: 561 { 562 for (int i = 0; i < numContexts; i++) { 563 if (i != initialApicId) { 564 apics.push_back(i); 565 } 566 } 567 } 568 break; 569 } 570 pendingIPIs += apics.size(); 571 intMasterPort.sendMessage(apics, message, timing); 572 newVal = regs[APIC_INTERRUPT_COMMAND_LOW]; 573 } 574 break; 575 case APIC_LVT_TIMER: 576 case APIC_LVT_THERMAL_SENSOR: 577 case APIC_LVT_PERFORMANCE_MONITORING_COUNTERS: 578 case APIC_LVT_LINT0: 579 case APIC_LVT_LINT1: 580 case APIC_LVT_ERROR: 581 { 582 uint64_t readOnlyMask = (1 << 12) | (1 << 14); 583 newVal = (val & ~readOnlyMask) | 584 (regs[reg] & readOnlyMask); 585 } 586 break; 587 case APIC_INITIAL_COUNT: 588 { 589 newVal = bits(val, 31, 0); 590 // Compute how many timer ticks we're being programmed for. 591 uint64_t newCount = newVal * 592 (divideFromConf(regs[APIC_DIVIDE_CONFIGURATION])); 593 // Schedule on the edge of the next tick plus the new count. 594 Tick offset = curTick() % clockPeriod(); 595 if (offset) { 596 reschedule(apicTimerEvent, 597 curTick() + (newCount + 1) * 598 clockPeriod() - offset, true); 599 } else { 600 reschedule(apicTimerEvent, 601 curTick() + newCount * 602 clockPeriod(), true); 603 } 604 } 605 break; 606 case APIC_CURRENT_COUNT: 607 //Local APIC Current Count register is read only. 608 return; 609 case APIC_DIVIDE_CONFIGURATION: 610 newVal = val & 0xB; 611 break; 612 default: 613 break; 614 } 615 regs[reg] = newVal; 616 return; 617} 618 619 620X86ISA::Interrupts::Interrupts(Params * p) : 621 BasicPioDevice(p), IntDev(this, p->int_latency), latency(p->pio_latency), 622 apicTimerEvent(this), 623 pendingSmi(false), smiVector(0), 624 pendingNmi(false), nmiVector(0), 625 pendingExtInt(false), extIntVector(0), 626 pendingInit(false), initVector(0), 627 pendingStartup(false), startupVector(0), 628 startedUp(false), pendingUnmaskableInt(false), 629 pendingIPIs(0), cpu(NULL), 630 intSlavePort(name() + ".int_slave", this, this) 631{ 632 pioSize = PageBytes; 633 memset(regs, 0, sizeof(regs)); 634 //Set the local apic DFR to the flat model. 635 regs[APIC_DESTINATION_FORMAT] = (uint32_t)(-1); 636 ISRV = 0; 637 IRRV = 0; 638} 639 640 641bool 642X86ISA::Interrupts::checkInterrupts(ThreadContext *tc) const 643{ 644 RFLAGS rflags = tc->readMiscRegNoEffect(MISCREG_RFLAGS); 645 if (pendingUnmaskableInt) { 646 DPRINTF(LocalApic, "Reported pending unmaskable interrupt.\n"); 647 return true; 648 } 649 if (rflags.intf) { 650 if (pendingExtInt) { 651 DPRINTF(LocalApic, "Reported pending external interrupt.\n"); 652 return true; 653 } 654 if (IRRV > ISRV && bits(IRRV, 7, 4) > 655 bits(regs[APIC_TASK_PRIORITY], 7, 4)) { 656 DPRINTF(LocalApic, "Reported pending regular interrupt.\n"); 657 return true; 658 } 659 } 660 return false; 661} 662 663Fault 664X86ISA::Interrupts::getInterrupt(ThreadContext *tc) 665{ 666 assert(checkInterrupts(tc)); 667 // These are all probably fairly uncommon, so we'll make them easier to 668 // check for. 669 if (pendingUnmaskableInt) { 670 if (pendingSmi) { 671 DPRINTF(LocalApic, "Generated SMI fault object.\n"); 672 return new SystemManagementInterrupt(); 673 } else if (pendingNmi) { 674 DPRINTF(LocalApic, "Generated NMI fault object.\n"); 675 return new NonMaskableInterrupt(nmiVector); 676 } else if (pendingInit) { 677 DPRINTF(LocalApic, "Generated INIT fault object.\n"); 678 return new InitInterrupt(initVector); 679 } else if (pendingStartup) { 680 DPRINTF(LocalApic, "Generating SIPI fault object.\n"); 681 return new StartupInterrupt(startupVector); 682 } else { 683 panic("pendingUnmaskableInt set, but no unmaskable " 684 "ints were pending.\n"); 685 return NoFault; 686 } 687 } else if (pendingExtInt) { 688 DPRINTF(LocalApic, "Generated external interrupt fault object.\n"); 689 return new ExternalInterrupt(extIntVector); 690 } else { 691 DPRINTF(LocalApic, "Generated regular interrupt fault object.\n"); 692 // The only thing left are fixed and lowest priority interrupts. 693 return new ExternalInterrupt(IRRV); 694 } 695} 696 697void 698X86ISA::Interrupts::updateIntrInfo(ThreadContext *tc) 699{ 700 assert(checkInterrupts(tc)); 701 if (pendingUnmaskableInt) { 702 if (pendingSmi) { 703 DPRINTF(LocalApic, "SMI sent to core.\n"); 704 pendingSmi = false; 705 } else if (pendingNmi) { 706 DPRINTF(LocalApic, "NMI sent to core.\n"); 707 pendingNmi = false; 708 } else if (pendingInit) { 709 DPRINTF(LocalApic, "Init sent to core.\n"); 710 pendingInit = false; 711 startedUp = false; 712 } else if (pendingStartup) { 713 DPRINTF(LocalApic, "SIPI sent to core.\n"); 714 pendingStartup = false; 715 startedUp = true; 716 } 717 if (!(pendingSmi || pendingNmi || pendingInit || pendingStartup)) 718 pendingUnmaskableInt = false; 719 } else if (pendingExtInt) { 720 pendingExtInt = false; 721 } else { 722 DPRINTF(LocalApic, "Interrupt %d sent to core.\n", IRRV); 723 // Mark the interrupt as "in service". 724 ISRV = IRRV; 725 setRegArrayBit(APIC_IN_SERVICE_BASE, ISRV); 726 // Clear it out of the IRR. 727 clearRegArrayBit(APIC_INTERRUPT_REQUEST_BASE, IRRV); 728 updateIRRV(); 729 } 730} 731 732void 733X86ISA::Interrupts::serialize(std::ostream &os) 734{ 735 SERIALIZE_ARRAY(regs, NUM_APIC_REGS); 736 SERIALIZE_SCALAR(pendingSmi); 737 SERIALIZE_SCALAR(smiVector); 738 SERIALIZE_SCALAR(pendingNmi); 739 SERIALIZE_SCALAR(nmiVector); 740 SERIALIZE_SCALAR(pendingExtInt); 741 SERIALIZE_SCALAR(extIntVector); 742 SERIALIZE_SCALAR(pendingInit); 743 SERIALIZE_SCALAR(initVector); 744 SERIALIZE_SCALAR(pendingStartup); 745 SERIALIZE_SCALAR(startupVector); 746 SERIALIZE_SCALAR(startedUp); 747 SERIALIZE_SCALAR(pendingUnmaskableInt); 748 SERIALIZE_SCALAR(pendingIPIs); 749 SERIALIZE_SCALAR(IRRV); 750 SERIALIZE_SCALAR(ISRV); 751 bool apicTimerEventScheduled = apicTimerEvent.scheduled(); 752 SERIALIZE_SCALAR(apicTimerEventScheduled); 753 Tick apicTimerEventTick = apicTimerEvent.when(); 754 SERIALIZE_SCALAR(apicTimerEventTick); 755} 756 757void 758X86ISA::Interrupts::unserialize(Checkpoint *cp, const std::string §ion) 759{ 760 UNSERIALIZE_ARRAY(regs, NUM_APIC_REGS); 761 UNSERIALIZE_SCALAR(pendingSmi); 762 UNSERIALIZE_SCALAR(smiVector); 763 UNSERIALIZE_SCALAR(pendingNmi); 764 UNSERIALIZE_SCALAR(nmiVector); 765 UNSERIALIZE_SCALAR(pendingExtInt); 766 UNSERIALIZE_SCALAR(extIntVector); 767 UNSERIALIZE_SCALAR(pendingInit); 768 UNSERIALIZE_SCALAR(initVector); 769 UNSERIALIZE_SCALAR(pendingStartup); 770 UNSERIALIZE_SCALAR(startupVector); 771 UNSERIALIZE_SCALAR(startedUp); 772 UNSERIALIZE_SCALAR(pendingUnmaskableInt); 773 UNSERIALIZE_SCALAR(pendingIPIs); 774 UNSERIALIZE_SCALAR(IRRV); 775 UNSERIALIZE_SCALAR(ISRV); 776 bool apicTimerEventScheduled; 777 UNSERIALIZE_SCALAR(apicTimerEventScheduled); 778 if (apicTimerEventScheduled) { 779 Tick apicTimerEventTick; 780 UNSERIALIZE_SCALAR(apicTimerEventTick); 781 if (apicTimerEvent.scheduled()) { 782 reschedule(apicTimerEvent, apicTimerEventTick, true); 783 } else { 784 schedule(apicTimerEvent, apicTimerEventTick); 785 } 786 } 787} 788 789X86ISA::Interrupts * 790X86LocalApicParams::create() 791{ 792 return new X86ISA::Interrupts(this); 793} 794