i82094aa.cc revision 9524
15643Sgblack@eecs.umich.edu/* 25643Sgblack@eecs.umich.edu * Copyright (c) 2008 The Regents of The University of Michigan 35643Sgblack@eecs.umich.edu * All rights reserved. 45643Sgblack@eecs.umich.edu * 55643Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65643Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75643Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85643Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95643Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105643Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115643Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125643Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135643Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145643Sgblack@eecs.umich.edu * this software without specific prior written permission. 155643Sgblack@eecs.umich.edu * 165643Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175643Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185643Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195643Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205643Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215643Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225643Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235643Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245643Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255643Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265643Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275643Sgblack@eecs.umich.edu * 285643Sgblack@eecs.umich.edu * Authors: Gabe Black 295643Sgblack@eecs.umich.edu */ 305643Sgblack@eecs.umich.edu 316138Sgblack@eecs.umich.edu#include "arch/x86/interrupts.hh" 325651Sgblack@eecs.umich.edu#include "arch/x86/intmessage.hh" 338746Sgblack@eecs.umich.edu#include "cpu/base.hh" 348232Snate@binkert.org#include "debug/I82094AA.hh" 355643Sgblack@eecs.umich.edu#include "dev/x86/i82094aa.hh" 365657Sgblack@eecs.umich.edu#include "dev/x86/i8259.hh" 375643Sgblack@eecs.umich.edu#include "mem/packet.hh" 385643Sgblack@eecs.umich.edu#include "mem/packet_access.hh" 395643Sgblack@eecs.umich.edu#include "sim/system.hh" 405643Sgblack@eecs.umich.edu 416803Sgblack@eecs.umich.eduX86ISA::I82094AA::I82094AA(Params *p) : PioDevice(p), 426803Sgblack@eecs.umich.edu IntDev(this, p->int_latency), 435827Sgblack@eecs.umich.edu latency(p->pio_latency), pioAddr(p->pio_addr), 446139Sgblack@eecs.umich.edu extIntPic(p->external_int_pic), lowestPriorityOffset(0) 455643Sgblack@eecs.umich.edu{ 467913SBrad.Beckmann@amd.com // This assumes there's only one I/O APIC in the system and since the apic 477913SBrad.Beckmann@amd.com // id is stored in a 8-bit field with 0xff meaning broadcast, the id must 487913SBrad.Beckmann@amd.com // be less than 0xff 497913SBrad.Beckmann@amd.com 507913SBrad.Beckmann@amd.com assert(p->apic_id < 0xff); 516136Sgblack@eecs.umich.edu initialApicId = id = p->apic_id; 525643Sgblack@eecs.umich.edu arbId = id; 535643Sgblack@eecs.umich.edu regSel = 0; 545653Sgblack@eecs.umich.edu RedirTableEntry entry = 0; 555653Sgblack@eecs.umich.edu entry.mask = 1; 565653Sgblack@eecs.umich.edu for (int i = 0; i < TableSize; i++) { 575653Sgblack@eecs.umich.edu redirTable[i] = entry; 585827Sgblack@eecs.umich.edu pinStates[i] = false; 595653Sgblack@eecs.umich.edu } 605643Sgblack@eecs.umich.edu} 615643Sgblack@eecs.umich.edu 627913SBrad.Beckmann@amd.comvoid 637913SBrad.Beckmann@amd.comX86ISA::I82094AA::init() 647913SBrad.Beckmann@amd.com{ 657913SBrad.Beckmann@amd.com // The io apic must register its address ranges on both its pio port 667913SBrad.Beckmann@amd.com // via the piodevice init() function and its int port that it inherited 677913SBrad.Beckmann@amd.com // from IntDev. Note IntDev is not a SimObject itself. 687913SBrad.Beckmann@amd.com 697913SBrad.Beckmann@amd.com PioDevice::init(); 707913SBrad.Beckmann@amd.com IntDev::init(); 717913SBrad.Beckmann@amd.com} 727913SBrad.Beckmann@amd.com 735643Sgblack@eecs.umich.eduTick 745643Sgblack@eecs.umich.eduX86ISA::I82094AA::read(PacketPtr pkt) 755643Sgblack@eecs.umich.edu{ 765643Sgblack@eecs.umich.edu assert(pkt->getSize() == 4); 775643Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 785643Sgblack@eecs.umich.edu switch(offset) { 795643Sgblack@eecs.umich.edu case 0: 805643Sgblack@eecs.umich.edu pkt->set<uint32_t>(regSel); 815643Sgblack@eecs.umich.edu break; 825643Sgblack@eecs.umich.edu case 16: 835643Sgblack@eecs.umich.edu pkt->set<uint32_t>(readReg(regSel)); 845643Sgblack@eecs.umich.edu break; 855643Sgblack@eecs.umich.edu default: 865643Sgblack@eecs.umich.edu panic("Illegal read from I/O APIC.\n"); 875643Sgblack@eecs.umich.edu } 885898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 895643Sgblack@eecs.umich.edu return latency; 905643Sgblack@eecs.umich.edu} 915643Sgblack@eecs.umich.edu 925643Sgblack@eecs.umich.eduTick 935643Sgblack@eecs.umich.eduX86ISA::I82094AA::write(PacketPtr pkt) 945643Sgblack@eecs.umich.edu{ 955643Sgblack@eecs.umich.edu assert(pkt->getSize() == 4); 965643Sgblack@eecs.umich.edu Addr offset = pkt->getAddr() - pioAddr; 975643Sgblack@eecs.umich.edu switch(offset) { 985643Sgblack@eecs.umich.edu case 0: 995643Sgblack@eecs.umich.edu regSel = pkt->get<uint32_t>(); 1005643Sgblack@eecs.umich.edu break; 1015643Sgblack@eecs.umich.edu case 16: 1025643Sgblack@eecs.umich.edu writeReg(regSel, pkt->get<uint32_t>()); 1035643Sgblack@eecs.umich.edu break; 1045643Sgblack@eecs.umich.edu default: 1055643Sgblack@eecs.umich.edu panic("Illegal write to I/O APIC.\n"); 1065643Sgblack@eecs.umich.edu } 1075898Sgblack@eecs.umich.edu pkt->makeAtomicResponse(); 1085643Sgblack@eecs.umich.edu return latency; 1095643Sgblack@eecs.umich.edu} 1105643Sgblack@eecs.umich.edu 1115643Sgblack@eecs.umich.eduvoid 1125643Sgblack@eecs.umich.eduX86ISA::I82094AA::writeReg(uint8_t offset, uint32_t value) 1135643Sgblack@eecs.umich.edu{ 1145643Sgblack@eecs.umich.edu if (offset == 0x0) { 1157913SBrad.Beckmann@amd.com id = bits(value, 31, 24); 1165643Sgblack@eecs.umich.edu } else if (offset == 0x1) { 1175643Sgblack@eecs.umich.edu // The IOAPICVER register is read only. 1185643Sgblack@eecs.umich.edu } else if (offset == 0x2) { 1197913SBrad.Beckmann@amd.com arbId = bits(value, 31, 24); 1205643Sgblack@eecs.umich.edu } else if (offset >= 0x10 && offset <= (0x10 + TableSize * 2)) { 1215643Sgblack@eecs.umich.edu int index = (offset - 0x10) / 2; 1225643Sgblack@eecs.umich.edu if (offset % 2) { 1235643Sgblack@eecs.umich.edu redirTable[index].topDW = value; 1245643Sgblack@eecs.umich.edu redirTable[index].topReserved = 0; 1255643Sgblack@eecs.umich.edu } else { 1265643Sgblack@eecs.umich.edu redirTable[index].bottomDW = value; 1275643Sgblack@eecs.umich.edu redirTable[index].bottomReserved = 0; 1285643Sgblack@eecs.umich.edu } 1295643Sgblack@eecs.umich.edu } else { 1305643Sgblack@eecs.umich.edu warn("Access to undefined I/O APIC register %#x.\n", offset); 1315643Sgblack@eecs.umich.edu } 1325643Sgblack@eecs.umich.edu DPRINTF(I82094AA, 1335643Sgblack@eecs.umich.edu "Wrote %#x to I/O APIC register %#x .\n", value, offset); 1345643Sgblack@eecs.umich.edu} 1355643Sgblack@eecs.umich.edu 1365643Sgblack@eecs.umich.eduuint32_t 1375643Sgblack@eecs.umich.eduX86ISA::I82094AA::readReg(uint8_t offset) 1385643Sgblack@eecs.umich.edu{ 1395643Sgblack@eecs.umich.edu uint32_t result = 0; 1405643Sgblack@eecs.umich.edu if (offset == 0x0) { 1415643Sgblack@eecs.umich.edu result = id << 24; 1425643Sgblack@eecs.umich.edu } else if (offset == 0x1) { 1435643Sgblack@eecs.umich.edu result = ((TableSize - 1) << 16) | APICVersion; 1445643Sgblack@eecs.umich.edu } else if (offset == 0x2) { 1455643Sgblack@eecs.umich.edu result = arbId << 24; 1465643Sgblack@eecs.umich.edu } else if (offset >= 0x10 && offset <= (0x10 + TableSize * 2)) { 1475643Sgblack@eecs.umich.edu int index = (offset - 0x10) / 2; 1485643Sgblack@eecs.umich.edu if (offset % 2) { 1495643Sgblack@eecs.umich.edu result = redirTable[index].topDW; 1505643Sgblack@eecs.umich.edu } else { 1515643Sgblack@eecs.umich.edu result = redirTable[index].bottomDW; 1525643Sgblack@eecs.umich.edu } 1535643Sgblack@eecs.umich.edu } else { 1545643Sgblack@eecs.umich.edu warn("Access to undefined I/O APIC register %#x.\n", offset); 1555643Sgblack@eecs.umich.edu } 1565643Sgblack@eecs.umich.edu DPRINTF(I82094AA, 1575643Sgblack@eecs.umich.edu "Read %#x from I/O APIC register %#x.\n", result, offset); 1585643Sgblack@eecs.umich.edu return result; 1595643Sgblack@eecs.umich.edu} 1605643Sgblack@eecs.umich.edu 1615643Sgblack@eecs.umich.eduvoid 1625643Sgblack@eecs.umich.eduX86ISA::I82094AA::signalInterrupt(int line) 1635643Sgblack@eecs.umich.edu{ 1645643Sgblack@eecs.umich.edu DPRINTF(I82094AA, "Received interrupt %d.\n", line); 1655643Sgblack@eecs.umich.edu assert(line < TableSize); 1665643Sgblack@eecs.umich.edu RedirTableEntry entry = redirTable[line]; 1675643Sgblack@eecs.umich.edu if (entry.mask) { 1685643Sgblack@eecs.umich.edu DPRINTF(I82094AA, "Entry was masked.\n"); 1695643Sgblack@eecs.umich.edu return; 1705643Sgblack@eecs.umich.edu } else { 1716712Snate@binkert.org TriggerIntMessage message = 0; 1725651Sgblack@eecs.umich.edu message.destination = entry.dest; 1735657Sgblack@eecs.umich.edu if (entry.deliveryMode == DeliveryMode::ExtInt) { 1745657Sgblack@eecs.umich.edu assert(extIntPic); 1755657Sgblack@eecs.umich.edu message.vector = extIntPic->getVector(); 1765657Sgblack@eecs.umich.edu } else { 1775657Sgblack@eecs.umich.edu message.vector = entry.vector; 1785657Sgblack@eecs.umich.edu } 1795651Sgblack@eecs.umich.edu message.deliveryMode = entry.deliveryMode; 1805651Sgblack@eecs.umich.edu message.destMode = entry.destMode; 1815654Sgblack@eecs.umich.edu message.level = entry.polarity; 1825654Sgblack@eecs.umich.edu message.trigger = entry.trigger; 1836138Sgblack@eecs.umich.edu ApicList apics; 1846138Sgblack@eecs.umich.edu int numContexts = sys->numContexts(); 1856138Sgblack@eecs.umich.edu if (message.destMode == 0) { 1866138Sgblack@eecs.umich.edu if (message.deliveryMode == DeliveryMode::LowestPriority) { 1876138Sgblack@eecs.umich.edu panic("Lowest priority delivery mode from the " 1886138Sgblack@eecs.umich.edu "IO APIC aren't supported in physical " 1896138Sgblack@eecs.umich.edu "destination mode.\n"); 1906138Sgblack@eecs.umich.edu } 1916138Sgblack@eecs.umich.edu if (message.destination == 0xFF) { 1926138Sgblack@eecs.umich.edu for (int i = 0; i < numContexts; i++) { 1936138Sgblack@eecs.umich.edu apics.push_back(i); 1946138Sgblack@eecs.umich.edu } 1956138Sgblack@eecs.umich.edu } else { 1966138Sgblack@eecs.umich.edu apics.push_back(message.destination); 1976138Sgblack@eecs.umich.edu } 1986138Sgblack@eecs.umich.edu } else { 1996138Sgblack@eecs.umich.edu for (int i = 0; i < numContexts; i++) { 2008746Sgblack@eecs.umich.edu Interrupts *localApic = sys->getThreadContext(i)-> 2018746Sgblack@eecs.umich.edu getCpuPtr()->getInterruptController(); 2026138Sgblack@eecs.umich.edu if ((localApic->readReg(APIC_LOGICAL_DESTINATION) >> 24) & 2036138Sgblack@eecs.umich.edu message.destination) { 2048746Sgblack@eecs.umich.edu apics.push_back(localApic->getInitialApicId()); 2056138Sgblack@eecs.umich.edu } 2066138Sgblack@eecs.umich.edu } 2076139Sgblack@eecs.umich.edu if (message.deliveryMode == DeliveryMode::LowestPriority && 2086139Sgblack@eecs.umich.edu apics.size()) { 2096139Sgblack@eecs.umich.edu // The manual seems to suggest that the chipset just does 2106139Sgblack@eecs.umich.edu // something reasonable for these instead of actually using 2116139Sgblack@eecs.umich.edu // state from the local APIC. We'll just rotate an offset 2126139Sgblack@eecs.umich.edu // through the set of APICs selected above. 2136139Sgblack@eecs.umich.edu uint64_t modOffset = lowestPriorityOffset % apics.size(); 2146139Sgblack@eecs.umich.edu lowestPriorityOffset++; 2156139Sgblack@eecs.umich.edu ApicList::iterator apicIt = apics.begin(); 2166139Sgblack@eecs.umich.edu while (modOffset--) { 2176139Sgblack@eecs.umich.edu apicIt++; 2186139Sgblack@eecs.umich.edu assert(apicIt != apics.end()); 2196139Sgblack@eecs.umich.edu } 2206139Sgblack@eecs.umich.edu int selected = *apicIt; 2216139Sgblack@eecs.umich.edu apics.clear(); 2226139Sgblack@eecs.umich.edu apics.push_back(selected); 2236138Sgblack@eecs.umich.edu } 2246138Sgblack@eecs.umich.edu } 2259524SAndreas.Sandberg@ARM.com intMasterPort.sendMessage(apics, message, sys->isTimingMode()); 2265643Sgblack@eecs.umich.edu } 2275643Sgblack@eecs.umich.edu} 2285643Sgblack@eecs.umich.edu 2295827Sgblack@eecs.umich.eduvoid 2305827Sgblack@eecs.umich.eduX86ISA::I82094AA::raiseInterruptPin(int number) 2315827Sgblack@eecs.umich.edu{ 2325827Sgblack@eecs.umich.edu assert(number < TableSize); 2335827Sgblack@eecs.umich.edu if (!pinStates[number]) 2345827Sgblack@eecs.umich.edu signalInterrupt(number); 2355827Sgblack@eecs.umich.edu pinStates[number] = true; 2365827Sgblack@eecs.umich.edu} 2375827Sgblack@eecs.umich.edu 2385827Sgblack@eecs.umich.eduvoid 2395827Sgblack@eecs.umich.eduX86ISA::I82094AA::lowerInterruptPin(int number) 2405827Sgblack@eecs.umich.edu{ 2415827Sgblack@eecs.umich.edu assert(number < TableSize); 2425827Sgblack@eecs.umich.edu pinStates[number] = false; 2435827Sgblack@eecs.umich.edu} 2445827Sgblack@eecs.umich.edu 2456137Sgblack@eecs.umich.eduvoid 2467903Shestness@cs.utexas.eduX86ISA::I82094AA::serialize(std::ostream &os) 2477903Shestness@cs.utexas.edu{ 2487903Shestness@cs.utexas.edu uint64_t* redirTableArray = (uint64_t*)redirTable; 2497903Shestness@cs.utexas.edu SERIALIZE_SCALAR(regSel); 2507903Shestness@cs.utexas.edu SERIALIZE_SCALAR(initialApicId); 2517903Shestness@cs.utexas.edu SERIALIZE_SCALAR(id); 2527903Shestness@cs.utexas.edu SERIALIZE_SCALAR(arbId); 2537903Shestness@cs.utexas.edu SERIALIZE_SCALAR(lowestPriorityOffset); 2547903Shestness@cs.utexas.edu SERIALIZE_ARRAY(redirTableArray, TableSize); 2557903Shestness@cs.utexas.edu SERIALIZE_ARRAY(pinStates, TableSize); 2567903Shestness@cs.utexas.edu} 2577903Shestness@cs.utexas.edu 2587903Shestness@cs.utexas.eduvoid 2597903Shestness@cs.utexas.eduX86ISA::I82094AA::unserialize(Checkpoint *cp, const std::string §ion) 2607903Shestness@cs.utexas.edu{ 2617903Shestness@cs.utexas.edu uint64_t redirTableArray[TableSize]; 2627903Shestness@cs.utexas.edu UNSERIALIZE_SCALAR(regSel); 2637903Shestness@cs.utexas.edu UNSERIALIZE_SCALAR(initialApicId); 2647903Shestness@cs.utexas.edu UNSERIALIZE_SCALAR(id); 2657903Shestness@cs.utexas.edu UNSERIALIZE_SCALAR(arbId); 2667903Shestness@cs.utexas.edu UNSERIALIZE_SCALAR(lowestPriorityOffset); 2677903Shestness@cs.utexas.edu UNSERIALIZE_ARRAY(redirTableArray, TableSize); 2687903Shestness@cs.utexas.edu UNSERIALIZE_ARRAY(pinStates, TableSize); 2697903Shestness@cs.utexas.edu for (int i = 0; i < TableSize; i++) { 2707903Shestness@cs.utexas.edu redirTable[i] = (RedirTableEntry)redirTableArray[i]; 2717903Shestness@cs.utexas.edu } 2727903Shestness@cs.utexas.edu} 2737903Shestness@cs.utexas.edu 2745643Sgblack@eecs.umich.eduX86ISA::I82094AA * 2755643Sgblack@eecs.umich.eduI82094AAParams::create() 2765643Sgblack@eecs.umich.edu{ 2775643Sgblack@eecs.umich.edu return new X86ISA::I82094AA(this); 2785643Sgblack@eecs.umich.edu} 279