interrupts.cc revision 8851:7e966326ef5b 
1/*
2 * Copyright (c) 2008 The Hewlett-Packard Development Company
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 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39
40#include "arch/x86/regs/apic.hh"
41#include "arch/x86/interrupts.hh"
42#include "arch/x86/intmessage.hh"
43#include "cpu/base.hh"
44#include "debug/LocalApic.hh"
45#include "dev/x86/i82094aa.hh"
46#include "dev/x86/pc.hh"
47#include "dev/x86/south_bridge.hh"
48#include "mem/packet_access.hh"
49#include "sim/system.hh"
50#include "sim/full_system.hh"
51
52int
53divideFromConf(uint32_t conf)
54{
55    // This figures out what division we want from the division configuration
56    // register in the local APIC. The encoding is a little odd but it can
57    // be deciphered fairly easily.
58    int shift = ((conf & 0x8) >> 1) | (conf & 0x3);
59    shift = (shift + 1) % 8;
60    return 1 << shift;
61}
62
63namespace X86ISA
64{
65
66ApicRegIndex
67decodeAddr(Addr paddr)
68{
69    ApicRegIndex regNum;
70    paddr &= ~mask(3);
71    switch (paddr)
72    {
73      case 0x20:
74        regNum = APIC_ID;
75        break;
76      case 0x30:
77        regNum = APIC_VERSION;
78        break;
79      case 0x80:
80        regNum = APIC_TASK_PRIORITY;
81        break;
82      case 0x90:
83        regNum = APIC_ARBITRATION_PRIORITY;
84        break;
85      case 0xA0:
86        regNum = APIC_PROCESSOR_PRIORITY;
87        break;
88      case 0xB0:
89        regNum = APIC_EOI;
90        break;
91      case 0xD0:
92        regNum = APIC_LOGICAL_DESTINATION;
93        break;
94      case 0xE0:
95        regNum = APIC_DESTINATION_FORMAT;
96        break;
97      case 0xF0:
98        regNum = APIC_SPURIOUS_INTERRUPT_VECTOR;
99        break;
100      case 0x100:
101      case 0x108:
102      case 0x110:
103      case 0x118:
104      case 0x120:
105      case 0x128:
106      case 0x130:
107      case 0x138:
108      case 0x140:
109      case 0x148:
110      case 0x150:
111      case 0x158:
112      case 0x160:
113      case 0x168:
114      case 0x170:
115      case 0x178:
116        regNum = APIC_IN_SERVICE((paddr - 0x100) / 0x8);
117        break;
118      case 0x180:
119      case 0x188:
120      case 0x190:
121      case 0x198:
122      case 0x1A0:
123      case 0x1A8:
124      case 0x1B0:
125      case 0x1B8:
126      case 0x1C0:
127      case 0x1C8:
128      case 0x1D0:
129      case 0x1D8:
130      case 0x1E0:
131      case 0x1E8:
132      case 0x1F0:
133      case 0x1F8:
134        regNum = APIC_TRIGGER_MODE((paddr - 0x180) / 0x8);
135        break;
136      case 0x200:
137      case 0x208:
138      case 0x210:
139      case 0x218:
140      case 0x220:
141      case 0x228:
142      case 0x230:
143      case 0x238:
144      case 0x240:
145      case 0x248:
146      case 0x250:
147      case 0x258:
148      case 0x260:
149      case 0x268:
150      case 0x270:
151      case 0x278:
152        regNum = APIC_INTERRUPT_REQUEST((paddr - 0x200) / 0x8);
153        break;
154      case 0x280:
155        regNum = APIC_ERROR_STATUS;
156        break;
157      case 0x300:
158        regNum = APIC_INTERRUPT_COMMAND_LOW;
159        break;
160      case 0x310:
161        regNum = APIC_INTERRUPT_COMMAND_HIGH;
162        break;
163      case 0x320:
164        regNum = APIC_LVT_TIMER;
165        break;
166      case 0x330:
167        regNum = APIC_LVT_THERMAL_SENSOR;
168        break;
169      case 0x340:
170        regNum = APIC_LVT_PERFORMANCE_MONITORING_COUNTERS;
171        break;
172      case 0x350:
173        regNum = APIC_LVT_LINT0;
174        break;
175      case 0x360:
176        regNum = APIC_LVT_LINT1;
177        break;
178      case 0x370:
179        regNum = APIC_LVT_ERROR;
180        break;
181      case 0x380:
182        regNum = APIC_INITIAL_COUNT;
183        break;
184      case 0x390:
185        regNum = APIC_CURRENT_COUNT;
186        break;
187      case 0x3E0:
188        regNum = APIC_DIVIDE_CONFIGURATION;
189        break;
190      default:
191        // A reserved register field.
192        panic("Accessed reserved register field %#x.\n", paddr);
193        break;
194    }
195    return regNum;
196}
197}
198
199Tick
200X86ISA::Interrupts::read(PacketPtr pkt)
201{
202    Addr offset = pkt->getAddr() - pioAddr;
203    //Make sure we're at least only accessing one register.
204    if ((offset & ~mask(3)) != ((offset + pkt->getSize()) & ~mask(3)))
205        panic("Accessed more than one register at a time in the APIC!\n");
206    ApicRegIndex reg = decodeAddr(offset);
207    uint32_t val = htog(readReg(reg));
208    DPRINTF(LocalApic,
209            "Reading Local APIC register %d at offset %#x as %#x.\n",
210            reg, offset, val);
211    pkt->setData(((uint8_t *)&val) + (offset & mask(3)));
212    pkt->makeAtomicResponse();
213    return latency;
214}
215
216Tick
217X86ISA::Interrupts::write(PacketPtr pkt)
218{
219    Addr offset = pkt->getAddr() - pioAddr;
220    //Make sure we're at least only accessing one register.
221    if ((offset & ~mask(3)) != ((offset + pkt->getSize()) & ~mask(3)))
222        panic("Accessed more than one register at a time in the APIC!\n");
223    ApicRegIndex reg = decodeAddr(offset);
224    uint32_t val = regs[reg];
225    pkt->writeData(((uint8_t *)&val) + (offset & mask(3)));
226    DPRINTF(LocalApic,
227            "Writing Local APIC register %d at offset %#x as %#x.\n",
228            reg, offset, gtoh(val));
229    setReg(reg, gtoh(val));
230    pkt->makeAtomicResponse();
231    return latency;
232}
233void
234X86ISA::Interrupts::requestInterrupt(uint8_t vector,
235        uint8_t deliveryMode, bool level)
236{
237    /*
238     * Fixed and lowest-priority delivery mode interrupts are handled
239     * using the IRR/ISR registers, checking against the TPR, etc.
240     * The SMI, NMI, ExtInt, INIT, etc interrupts go straight through.
241     */
242    if (deliveryMode == DeliveryMode::Fixed ||
243            deliveryMode == DeliveryMode::LowestPriority) {
244        DPRINTF(LocalApic, "Interrupt is an %s.\n",
245                DeliveryMode::names[deliveryMode]);
246        // Queue up the interrupt in the IRR.
247        if (vector > IRRV)
248            IRRV = vector;
249        if (!getRegArrayBit(APIC_INTERRUPT_REQUEST_BASE, vector)) {
250            setRegArrayBit(APIC_INTERRUPT_REQUEST_BASE, vector);
251            if (level) {
252                setRegArrayBit(APIC_TRIGGER_MODE_BASE, vector);
253            } else {
254                clearRegArrayBit(APIC_TRIGGER_MODE_BASE, vector);
255            }
256        }
257    } else if (!DeliveryMode::isReserved(deliveryMode)) {
258        DPRINTF(LocalApic, "Interrupt is an %s.\n",
259                DeliveryMode::names[deliveryMode]);
260        if (deliveryMode == DeliveryMode::SMI && !pendingSmi) {
261            pendingUnmaskableInt = pendingSmi = true;
262            smiVector = vector;
263        } else if (deliveryMode == DeliveryMode::NMI && !pendingNmi) {
264            pendingUnmaskableInt = pendingNmi = true;
265            nmiVector = vector;
266        } else if (deliveryMode == DeliveryMode::ExtInt && !pendingExtInt) {
267            pendingExtInt = true;
268            extIntVector = vector;
269        } else if (deliveryMode == DeliveryMode::INIT && !pendingInit) {
270            pendingUnmaskableInt = pendingInit = true;
271            initVector = vector;
272        } else if (deliveryMode == DeliveryMode::SIPI &&
273                !pendingStartup && !startedUp) {
274            pendingUnmaskableInt = pendingStartup = true;
275            startupVector = vector;
276        }
277    }
278    if (FullSystem)
279        cpu->wakeup();
280}
281
282
283void
284X86ISA::Interrupts::setCPU(BaseCPU * newCPU)
285{
286    assert(newCPU);
287    if (cpu != NULL && cpu->cpuId() != newCPU->cpuId()) {
288        panic("Local APICs can't be moved between CPUs"
289                " with different IDs.\n");
290    }
291    cpu = newCPU;
292    initialApicId = cpu->cpuId();
293    regs[APIC_ID] = (initialApicId << 24);
294}
295
296
297void
298X86ISA::Interrupts::init()
299{
300    //
301    // The local apic must register its address ranges on both its pio port
302    // via the basicpiodevice(piodevice) init() function and its int port
303    // that it inherited from IntDev.  Note IntDev is not a SimObject itself.
304    //
305    BasicPioDevice::init();
306    IntDev::init();
307}
308
309
310Tick
311X86ISA::Interrupts::recvMessage(PacketPtr pkt)
312{
313    Addr offset = pkt->getAddr() - x86InterruptAddress(initialApicId, 0);
314    assert(pkt->cmd == MemCmd::MessageReq);
315    switch(offset)
316    {
317      case 0:
318        {
319            TriggerIntMessage message = pkt->get<TriggerIntMessage>();
320            DPRINTF(LocalApic,
321                    "Got Trigger Interrupt message with vector %#x.\n",
322                    message.vector);
323
324            requestInterrupt(message.vector,
325                    message.deliveryMode, message.trigger);
326        }
327        break;
328      default:
329        panic("Local apic got unknown interrupt message at offset %#x.\n",
330                offset);
331        break;
332    }
333    pkt->makeAtomicResponse();
334    return latency;
335}
336
337
338Tick
339X86ISA::Interrupts::recvResponse(PacketPtr pkt)
340{
341    assert(!pkt->isError());
342    assert(pkt->cmd == MemCmd::MessageResp);
343    if (--pendingIPIs == 0) {
344        InterruptCommandRegLow low = regs[APIC_INTERRUPT_COMMAND_LOW];
345        // Record that the ICR is now idle.
346        low.deliveryStatus = 0;
347        regs[APIC_INTERRUPT_COMMAND_LOW] = low;
348    }
349    DPRINTF(LocalApic, "ICR is now idle.\n");
350    return 0;
351}
352
353
354AddrRangeList
355X86ISA::Interrupts::getAddrRanges()
356{
357    AddrRangeList ranges;
358    Range<Addr> range = RangeEx(x86LocalAPICAddress(initialApicId, 0),
359                                x86LocalAPICAddress(initialApicId, 0) +
360                                PageBytes);
361    ranges.push_back(range);
362    pioAddr = range.start;
363    return ranges;
364}
365
366
367AddrRangeList
368X86ISA::Interrupts::getIntAddrRange()
369{
370    AddrRangeList ranges;
371    ranges.push_back(RangeEx(x86InterruptAddress(initialApicId, 0),
372                             x86InterruptAddress(initialApicId, 0) +
373                             PhysAddrAPICRangeSize));
374    return ranges;
375}
376
377
378uint32_t
379X86ISA::Interrupts::readReg(ApicRegIndex reg)
380{
381    if (reg >= APIC_TRIGGER_MODE(0) &&
382            reg <= APIC_TRIGGER_MODE(15)) {
383        panic("Local APIC Trigger Mode registers are unimplemented.\n");
384    }
385    switch (reg) {
386      case APIC_ARBITRATION_PRIORITY:
387        panic("Local APIC Arbitration Priority register unimplemented.\n");
388        break;
389      case APIC_PROCESSOR_PRIORITY:
390        panic("Local APIC Processor Priority register unimplemented.\n");
391        break;
392      case APIC_ERROR_STATUS:
393        regs[APIC_INTERNAL_STATE] &= ~ULL(0x1);
394        break;
395      case APIC_CURRENT_COUNT:
396        {
397            if (apicTimerEvent.scheduled()) {
398                assert(clock);
399                // Compute how many m5 ticks happen per count.
400                uint64_t ticksPerCount = clock *
401                    divideFromConf(regs[APIC_DIVIDE_CONFIGURATION]);
402                // Compute how many m5 ticks are left.
403                uint64_t val = apicTimerEvent.when() - curTick();
404                // Turn that into a count.
405                val = (val + ticksPerCount - 1) / ticksPerCount;
406                return val;
407            } else {
408                return 0;
409            }
410        }
411      default:
412        break;
413    }
414    return regs[reg];
415}
416
417void
418X86ISA::Interrupts::setReg(ApicRegIndex reg, uint32_t val)
419{
420    uint32_t newVal = val;
421    if (reg >= APIC_IN_SERVICE(0) &&
422            reg <= APIC_IN_SERVICE(15)) {
423        panic("Local APIC In-Service registers are unimplemented.\n");
424    }
425    if (reg >= APIC_TRIGGER_MODE(0) &&
426            reg <= APIC_TRIGGER_MODE(15)) {
427        panic("Local APIC Trigger Mode registers are unimplemented.\n");
428    }
429    if (reg >= APIC_INTERRUPT_REQUEST(0) &&
430            reg <= APIC_INTERRUPT_REQUEST(15)) {
431        panic("Local APIC Interrupt Request registers "
432                "are unimplemented.\n");
433    }
434    switch (reg) {
435      case APIC_ID:
436        newVal = val & 0xFF;
437        break;
438      case APIC_VERSION:
439        // The Local APIC Version register is read only.
440        return;
441      case APIC_TASK_PRIORITY:
442        newVal = val & 0xFF;
443        break;
444      case APIC_ARBITRATION_PRIORITY:
445        panic("Local APIC Arbitration Priority register unimplemented.\n");
446        break;
447      case APIC_PROCESSOR_PRIORITY:
448        panic("Local APIC Processor Priority register unimplemented.\n");
449        break;
450      case APIC_EOI:
451        // Remove the interrupt that just completed from the local apic state.
452        clearRegArrayBit(APIC_IN_SERVICE_BASE, ISRV);
453        updateISRV();
454        return;
455      case APIC_LOGICAL_DESTINATION:
456        newVal = val & 0xFF000000;
457        break;
458      case APIC_DESTINATION_FORMAT:
459        newVal = val | 0x0FFFFFFF;
460        break;
461      case APIC_SPURIOUS_INTERRUPT_VECTOR:
462        regs[APIC_INTERNAL_STATE] &= ~ULL(1 << 1);
463        regs[APIC_INTERNAL_STATE] |= val & (1 << 8);
464        if (val & (1 << 9))
465            warn("Focus processor checking not implemented.\n");
466        break;
467      case APIC_ERROR_STATUS:
468        {
469            if (regs[APIC_INTERNAL_STATE] & 0x1) {
470                regs[APIC_INTERNAL_STATE] &= ~ULL(0x1);
471                newVal = 0;
472            } else {
473                regs[APIC_INTERNAL_STATE] |= ULL(0x1);
474                return;
475            }
476
477        }
478        break;
479      case APIC_INTERRUPT_COMMAND_LOW:
480        {
481            InterruptCommandRegLow low = regs[APIC_INTERRUPT_COMMAND_LOW];
482            // Check if we're already sending an IPI.
483            if (low.deliveryStatus) {
484                newVal = low;
485                break;
486            }
487            low = val;
488            InterruptCommandRegHigh high = regs[APIC_INTERRUPT_COMMAND_HIGH];
489            // Record that an IPI is being sent.
490            low.deliveryStatus = 1;
491            TriggerIntMessage message = 0;
492            message.destination = high.destination;
493            message.vector = low.vector;
494            message.deliveryMode = low.deliveryMode;
495            message.destMode = low.destMode;
496            message.level = low.level;
497            message.trigger = low.trigger;
498            bool timing = sys->getMemoryMode() == Enums::timing;
499            // Be careful no updates of the delivery status bit get lost.
500            regs[APIC_INTERRUPT_COMMAND_LOW] = low;
501            ApicList apics;
502            int numContexts = sys->numContexts();
503            switch (low.destShorthand) {
504              case 0:
505                if (message.deliveryMode == DeliveryMode::LowestPriority) {
506                    panic("Lowest priority delivery mode "
507                            "IPIs aren't implemented.\n");
508                }
509                if (message.destMode == 1) {
510                    int dest = message.destination;
511                    hack_once("Assuming logical destinations are 1 << id.\n");
512                    for (int i = 0; i < numContexts; i++) {
513                        if (dest & 0x1)
514                            apics.push_back(i);
515                        dest = dest >> 1;
516                    }
517                } else {
518                    if (message.destination == 0xFF) {
519                        for (int i = 0; i < numContexts; i++) {
520                            if (i == initialApicId) {
521                                requestInterrupt(message.vector,
522                                        message.deliveryMode, message.trigger);
523                            } else {
524                                apics.push_back(i);
525                            }
526                        }
527                    } else {
528                        if (message.destination == initialApicId) {
529                            requestInterrupt(message.vector,
530                                    message.deliveryMode, message.trigger);
531                        } else {
532                            apics.push_back(message.destination);
533                        }
534                    }
535                }
536                break;
537              case 1:
538                newVal = val;
539                requestInterrupt(message.vector,
540                        message.deliveryMode, message.trigger);
541                break;
542              case 2:
543                requestInterrupt(message.vector,
544                        message.deliveryMode, message.trigger);
545                // Fall through
546              case 3:
547                {
548                    for (int i = 0; i < numContexts; i++) {
549                        if (i != initialApicId) {
550                            apics.push_back(i);
551                        }
552                    }
553                }
554                break;
555            }
556            pendingIPIs += apics.size();
557            intPort.sendMessage(apics, message, timing);
558            newVal = regs[APIC_INTERRUPT_COMMAND_LOW];
559        }
560        break;
561      case APIC_LVT_TIMER:
562      case APIC_LVT_THERMAL_SENSOR:
563      case APIC_LVT_PERFORMANCE_MONITORING_COUNTERS:
564      case APIC_LVT_LINT0:
565      case APIC_LVT_LINT1:
566      case APIC_LVT_ERROR:
567        {
568            uint64_t readOnlyMask = (1 << 12) | (1 << 14);
569            newVal = (val & ~readOnlyMask) |
570                     (regs[reg] & readOnlyMask);
571        }
572        break;
573      case APIC_INITIAL_COUNT:
574        {
575            assert(clock);
576            newVal = bits(val, 31, 0);
577            // Compute how many timer ticks we're being programmed for.
578            uint64_t newCount = newVal *
579                (divideFromConf(regs[APIC_DIVIDE_CONFIGURATION]));
580            // Schedule on the edge of the next tick plus the new count.
581            Tick offset = curTick() % clock;
582            if (offset) {
583                reschedule(apicTimerEvent,
584                        curTick() + (newCount + 1) * clock - offset, true);
585            } else {
586                reschedule(apicTimerEvent,
587                        curTick() + newCount * clock, true);
588            }
589        }
590        break;
591      case APIC_CURRENT_COUNT:
592        //Local APIC Current Count register is read only.
593        return;
594      case APIC_DIVIDE_CONFIGURATION:
595        newVal = val & 0xB;
596        break;
597      default:
598        break;
599    }
600    regs[reg] = newVal;
601    return;
602}
603
604
605X86ISA::Interrupts::Interrupts(Params * p) :
606    BasicPioDevice(p), IntDev(this, p->int_latency), latency(p->pio_latency),
607    clock(0),
608    apicTimerEvent(this),
609    pendingSmi(false), smiVector(0),
610    pendingNmi(false), nmiVector(0),
611    pendingExtInt(false), extIntVector(0),
612    pendingInit(false), initVector(0),
613    pendingStartup(false), startupVector(0),
614    startedUp(false), pendingUnmaskableInt(false),
615    pendingIPIs(0), cpu(NULL),
616    intSlavePort(name() + ".int_slave", this, this, latency)
617{
618    pioSize = PageBytes;
619    memset(regs, 0, sizeof(regs));
620    //Set the local apic DFR to the flat model.
621    regs[APIC_DESTINATION_FORMAT] = (uint32_t)(-1);
622    ISRV = 0;
623    IRRV = 0;
624}
625
626
627bool
628X86ISA::Interrupts::checkInterrupts(ThreadContext *tc) const
629{
630    RFLAGS rflags = tc->readMiscRegNoEffect(MISCREG_RFLAGS);
631    if (pendingUnmaskableInt) {
632        DPRINTF(LocalApic, "Reported pending unmaskable interrupt.\n");
633        return true;
634    }
635    if (rflags.intf) {
636        if (pendingExtInt) {
637            DPRINTF(LocalApic, "Reported pending external interrupt.\n");
638            return true;
639        }
640        if (IRRV > ISRV && bits(IRRV, 7, 4) >
641               bits(regs[APIC_TASK_PRIORITY], 7, 4)) {
642            DPRINTF(LocalApic, "Reported pending regular interrupt.\n");
643            return true;
644        }
645    }
646    return false;
647}
648
649Fault
650X86ISA::Interrupts::getInterrupt(ThreadContext *tc)
651{
652    assert(checkInterrupts(tc));
653    // These are all probably fairly uncommon, so we'll make them easier to
654    // check for.
655    if (pendingUnmaskableInt) {
656        if (pendingSmi) {
657            DPRINTF(LocalApic, "Generated SMI fault object.\n");
658            return new SystemManagementInterrupt();
659        } else if (pendingNmi) {
660            DPRINTF(LocalApic, "Generated NMI fault object.\n");
661            return new NonMaskableInterrupt(nmiVector);
662        } else if (pendingInit) {
663            DPRINTF(LocalApic, "Generated INIT fault object.\n");
664            return new InitInterrupt(initVector);
665        } else if (pendingStartup) {
666            DPRINTF(LocalApic, "Generating SIPI fault object.\n");
667            return new StartupInterrupt(startupVector);
668        } else {
669            panic("pendingUnmaskableInt set, but no unmaskable "
670                    "ints were pending.\n");
671            return NoFault;
672        }
673    } else if (pendingExtInt) {
674        DPRINTF(LocalApic, "Generated external interrupt fault object.\n");
675        return new ExternalInterrupt(extIntVector);
676    } else {
677        DPRINTF(LocalApic, "Generated regular interrupt fault object.\n");
678        // The only thing left are fixed and lowest priority interrupts.
679        return new ExternalInterrupt(IRRV);
680    }
681}
682
683void
684X86ISA::Interrupts::updateIntrInfo(ThreadContext *tc)
685{
686    assert(checkInterrupts(tc));
687    if (pendingUnmaskableInt) {
688        if (pendingSmi) {
689            DPRINTF(LocalApic, "SMI sent to core.\n");
690            pendingSmi = false;
691        } else if (pendingNmi) {
692            DPRINTF(LocalApic, "NMI sent to core.\n");
693            pendingNmi = false;
694        } else if (pendingInit) {
695            DPRINTF(LocalApic, "Init sent to core.\n");
696            pendingInit = false;
697            startedUp = false;
698        } else if (pendingStartup) {
699            DPRINTF(LocalApic, "SIPI sent to core.\n");
700            pendingStartup = false;
701            startedUp = true;
702        }
703        if (!(pendingSmi || pendingNmi || pendingInit || pendingStartup))
704            pendingUnmaskableInt = false;
705    } else if (pendingExtInt) {
706        pendingExtInt = false;
707    } else {
708        DPRINTF(LocalApic, "Interrupt %d sent to core.\n", IRRV);
709        // Mark the interrupt as "in service".
710        ISRV = IRRV;
711        setRegArrayBit(APIC_IN_SERVICE_BASE, ISRV);
712        // Clear it out of the IRR.
713        clearRegArrayBit(APIC_INTERRUPT_REQUEST_BASE, IRRV);
714        updateIRRV();
715    }
716}
717
718void
719X86ISA::Interrupts::serialize(std::ostream &os)
720{
721    SERIALIZE_ARRAY(regs, NUM_APIC_REGS);
722    SERIALIZE_SCALAR(clock);
723    SERIALIZE_SCALAR(pendingSmi);
724    SERIALIZE_SCALAR(smiVector);
725    SERIALIZE_SCALAR(pendingNmi);
726    SERIALIZE_SCALAR(nmiVector);
727    SERIALIZE_SCALAR(pendingExtInt);
728    SERIALIZE_SCALAR(extIntVector);
729    SERIALIZE_SCALAR(pendingInit);
730    SERIALIZE_SCALAR(initVector);
731    SERIALIZE_SCALAR(pendingStartup);
732    SERIALIZE_SCALAR(startupVector);
733    SERIALIZE_SCALAR(startedUp);
734    SERIALIZE_SCALAR(pendingUnmaskableInt);
735    SERIALIZE_SCALAR(pendingIPIs);
736    SERIALIZE_SCALAR(IRRV);
737    SERIALIZE_SCALAR(ISRV);
738    bool apicTimerEventScheduled = apicTimerEvent.scheduled();
739    SERIALIZE_SCALAR(apicTimerEventScheduled);
740    Tick apicTimerEventTick = apicTimerEvent.when();
741    SERIALIZE_SCALAR(apicTimerEventTick);
742}
743
744void
745X86ISA::Interrupts::unserialize(Checkpoint *cp, const std::string &section)
746{
747    UNSERIALIZE_ARRAY(regs, NUM_APIC_REGS);
748    UNSERIALIZE_SCALAR(clock);
749    UNSERIALIZE_SCALAR(pendingSmi);
750    UNSERIALIZE_SCALAR(smiVector);
751    UNSERIALIZE_SCALAR(pendingNmi);
752    UNSERIALIZE_SCALAR(nmiVector);
753    UNSERIALIZE_SCALAR(pendingExtInt);
754    UNSERIALIZE_SCALAR(extIntVector);
755    UNSERIALIZE_SCALAR(pendingInit);
756    UNSERIALIZE_SCALAR(initVector);
757    UNSERIALIZE_SCALAR(pendingStartup);
758    UNSERIALIZE_SCALAR(startupVector);
759    UNSERIALIZE_SCALAR(startedUp);
760    UNSERIALIZE_SCALAR(pendingUnmaskableInt);
761    UNSERIALIZE_SCALAR(pendingIPIs);
762    UNSERIALIZE_SCALAR(IRRV);
763    UNSERIALIZE_SCALAR(ISRV);
764    bool apicTimerEventScheduled;
765    UNSERIALIZE_SCALAR(apicTimerEventScheduled);
766    if (apicTimerEventScheduled) {
767        Tick apicTimerEventTick;
768        UNSERIALIZE_SCALAR(apicTimerEventTick);
769        if (apicTimerEvent.scheduled()) {
770            reschedule(apicTimerEvent, apicTimerEventTick, true);
771        } else {
772            schedule(apicTimerEvent, apicTimerEventTick);
773        }
774    }
775}
776
777X86ISA::Interrupts *
778X86LocalApicParams::create()
779{
780    return new X86ISA::Interrupts(this);
781}
782