interrupts.hh revision 9294
1/* 2 * Copyright (c) 2012 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) 2007 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 * Andreas Hansson 51 */ 52 53#ifndef __ARCH_X86_INTERRUPTS_HH__ 54#define __ARCH_X86_INTERRUPTS_HH__ 55 56#include "arch/x86/regs/apic.hh" 57#include "arch/x86/faults.hh" 58#include "arch/x86/intmessage.hh" 59#include "base/bitfield.hh" 60#include "cpu/thread_context.hh" 61#include "dev/x86/intdev.hh" 62#include "dev/io_device.hh" 63#include "params/X86LocalApic.hh" 64#include "sim/eventq.hh" 65 66class ThreadContext; 67class BaseCPU; 68 69namespace X86ISA { 70 71class Interrupts : public BasicPioDevice, IntDev 72{ 73 protected: 74 // Storage for the APIC registers 75 uint32_t regs[NUM_APIC_REGS]; 76 77 BitUnion32(LVTEntry) 78 Bitfield<7, 0> vector; 79 Bitfield<10, 8> deliveryMode; 80 Bitfield<12> status; 81 Bitfield<13> polarity; 82 Bitfield<14> remoteIRR; 83 Bitfield<15> trigger; 84 Bitfield<16> masked; 85 Bitfield<17> periodic; 86 EndBitUnion(LVTEntry) 87 88 /* 89 * Timing related stuff. 90 */ 91 Tick latency; 92 93 class ApicTimerEvent : public Event 94 { 95 private: 96 Interrupts *localApic; 97 public: 98 ApicTimerEvent(Interrupts *_localApic) : 99 Event(), localApic(_localApic) 100 {} 101 102 void process() 103 { 104 assert(localApic); 105 if (localApic->triggerTimerInterrupt()) { 106 localApic->setReg(APIC_INITIAL_COUNT, 107 localApic->readReg(APIC_INITIAL_COUNT)); 108 } 109 } 110 }; 111 112 ApicTimerEvent apicTimerEvent; 113 114 /* 115 * A set of variables to keep track of interrupts that don't go through 116 * the IRR. 117 */ 118 bool pendingSmi; 119 uint8_t smiVector; 120 bool pendingNmi; 121 uint8_t nmiVector; 122 bool pendingExtInt; 123 uint8_t extIntVector; 124 bool pendingInit; 125 uint8_t initVector; 126 bool pendingStartup; 127 uint8_t startupVector; 128 bool startedUp; 129 130 // This is a quick check whether any of the above (except ExtInt) are set. 131 bool pendingUnmaskableInt; 132 133 // A count of how many IPIs are in flight. 134 int pendingIPIs; 135 136 /* 137 * IRR and ISR maintenance. 138 */ 139 uint8_t IRRV; 140 uint8_t ISRV; 141 142 int 143 findRegArrayMSB(ApicRegIndex base) 144 { 145 int offset = 7; 146 do { 147 if (regs[base + offset] != 0) { 148 return offset * 32 + findMsbSet(regs[base + offset]); 149 } 150 } while (offset--); 151 return 0; 152 } 153 154 void 155 updateIRRV() 156 { 157 IRRV = findRegArrayMSB(APIC_INTERRUPT_REQUEST_BASE); 158 } 159 160 void 161 updateISRV() 162 { 163 ISRV = findRegArrayMSB(APIC_IN_SERVICE_BASE); 164 } 165 166 void 167 setRegArrayBit(ApicRegIndex base, uint8_t vector) 168 { 169 regs[base + (vector / 32)] |= (1 << (vector % 32)); 170 } 171 172 void 173 clearRegArrayBit(ApicRegIndex base, uint8_t vector) 174 { 175 regs[base + (vector / 32)] &= ~(1 << (vector % 32)); 176 } 177 178 bool 179 getRegArrayBit(ApicRegIndex base, uint8_t vector) 180 { 181 return bits(regs[base + (vector / 32)], vector % 5); 182 } 183 184 void requestInterrupt(uint8_t vector, uint8_t deliveryMode, bool level); 185 186 BaseCPU *cpu; 187 188 int initialApicId; 189 190 // Port for receiving interrupts 191 IntSlavePort intSlavePort; 192 193 public: 194 195 int getInitialApicId() { return initialApicId; } 196 197 /* 198 * Params stuff. 199 */ 200 typedef X86LocalApicParams Params; 201 202 void setCPU(BaseCPU * newCPU); 203 204 void 205 setClock(Tick newClock) 206 { 207 clock = newClock; 208 } 209 210 const Params * 211 params() const 212 { 213 return dynamic_cast<const Params *>(_params); 214 } 215 216 /* 217 * Initialize this object by registering it with the IO APIC. 218 */ 219 void init(); 220 221 /* 222 * Functions to interact with the interrupt port from IntDev. 223 */ 224 Tick read(PacketPtr pkt); 225 Tick write(PacketPtr pkt); 226 Tick recvMessage(PacketPtr pkt); 227 Tick recvResponse(PacketPtr pkt); 228 229 bool 230 triggerTimerInterrupt() 231 { 232 LVTEntry entry = regs[APIC_LVT_TIMER]; 233 if (!entry.masked) 234 requestInterrupt(entry.vector, entry.deliveryMode, entry.trigger); 235 return entry.periodic; 236 } 237 238 AddrRangeList getAddrRanges() const; 239 AddrRangeList getIntAddrRange() const; 240 241 BaseMasterPort &getMasterPort(const std::string &if_name, 242 PortID idx = InvalidPortID) 243 { 244 if (if_name == "int_master") { 245 return intMasterPort; 246 } 247 return BasicPioDevice::getMasterPort(if_name, idx); 248 } 249 250 BaseSlavePort &getSlavePort(const std::string &if_name, 251 PortID idx = InvalidPortID) 252 { 253 if (if_name == "int_slave") { 254 return intSlavePort; 255 } 256 return BasicPioDevice::getSlavePort(if_name, idx); 257 } 258 259 /* 260 * Functions to access and manipulate the APIC's registers. 261 */ 262 263 uint32_t readReg(ApicRegIndex miscReg); 264 void setReg(ApicRegIndex reg, uint32_t val); 265 void 266 setRegNoEffect(ApicRegIndex reg, uint32_t val) 267 { 268 regs[reg] = val; 269 } 270 271 /* 272 * Constructor. 273 */ 274 275 Interrupts(Params * p); 276 277 /* 278 * Functions for retrieving interrupts for the CPU to handle. 279 */ 280 281 bool checkInterrupts(ThreadContext *tc) const; 282 Fault getInterrupt(ThreadContext *tc); 283 void updateIntrInfo(ThreadContext *tc); 284 285 /* 286 * Serialization. 287 */ 288 289 virtual void serialize(std::ostream &os); 290 virtual void unserialize(Checkpoint *cp, const std::string §ion); 291 292 /* 293 * Old functions needed for compatability but which will be phased out 294 * eventually. 295 */ 296 void 297 post(int int_num, int index) 298 { 299 panic("Interrupts::post unimplemented!\n"); 300 } 301 302 void 303 clear(int int_num, int index) 304 { 305 panic("Interrupts::clear unimplemented!\n"); 306 } 307 308 void 309 clearAll() 310 { 311 panic("Interrupts::clearAll unimplemented!\n"); 312 } 313}; 314 315} // namespace X86ISA 316 317#endif // __ARCH_X86_INTERRUPTS_HH__ 318