faults.hh revision 7681
1/* 2 * Copyright (c) 2007 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#ifndef __ARCH_X86_FAULTS_HH__ 41#define __ARCH_X86_FAULTS_HH__ 42 43#include "base/bitunion.hh" 44#include "base/misc.hh" 45#include "sim/faults.hh" 46#include "sim/tlb.hh" 47 48#include <string> 49 50namespace X86ISA 51{ 52 // Base class for all x86 "faults" where faults is in the m5 sense 53 class X86FaultBase : public FaultBase 54 { 55 protected: 56 const char * faultName; 57 const char * mnem; 58 uint8_t vector; 59 uint64_t errorCode; 60 61 X86FaultBase(const char * _faultName, const char * _mnem, 62 const uint8_t _vector, uint64_t _errorCode = (uint64_t)-1) 63 : faultName(_faultName), mnem(_mnem), 64 vector(_vector), errorCode(_errorCode) 65 { 66 } 67 68 const char * name() const 69 { 70 return faultName; 71 } 72 73 virtual bool isBenign() 74 { 75 return true; 76 } 77 78 virtual const char * mnemonic() const 79 { 80 return mnem; 81 } 82 83 virtual bool isSoft() 84 { 85 return false; 86 } 87 88#if FULL_SYSTEM 89 void invoke(ThreadContext * tc, 90 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 91 92 virtual std::string describe() const; 93#endif 94 }; 95 96 // Base class for x86 faults which behave as if the underlying instruction 97 // didn't happen. 98 class X86Fault : public X86FaultBase 99 { 100 protected: 101 X86Fault(const char * name, const char * mnem, 102 const uint8_t vector, uint64_t _errorCode = (uint64_t)-1) 103 : X86FaultBase(name, mnem, vector, _errorCode) 104 {} 105 }; 106 107 // Base class for x86 traps which behave as if the underlying instruction 108 // completed. 109 class X86Trap : public X86FaultBase 110 { 111 protected: 112 X86Trap(const char * name, const char * mnem, 113 const uint8_t vector, uint64_t _errorCode = (uint64_t)-1) 114 : X86FaultBase(name, mnem, vector, _errorCode) 115 {} 116 117#if FULL_SYSTEM 118 void invoke(ThreadContext * tc, 119 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 120#endif 121 }; 122 123 // Base class for x86 aborts which seem to be catastrophic failures. 124 class X86Abort : public X86FaultBase 125 { 126 protected: 127 X86Abort(const char * name, const char * mnem, 128 const uint8_t vector, uint64_t _errorCode = (uint64_t)-1) 129 : X86FaultBase(name, mnem, vector, _errorCode) 130 {} 131 132#if FULL_SYSTEM 133 void invoke(ThreadContext * tc, 134 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 135#endif 136 }; 137 138 // Base class for x86 interrupts. 139 class X86Interrupt : public X86FaultBase 140 { 141 protected: 142 X86Interrupt(const char * name, const char * mnem, 143 const uint8_t _vector, uint64_t _errorCode = (uint64_t)-1) 144 : X86FaultBase(name, mnem, _vector, _errorCode) 145 {} 146 }; 147 148 class UnimpInstFault : public FaultBase 149 { 150 public: 151 const char * name() const 152 { 153 return "unimplemented_micro"; 154 } 155 156 void invoke(ThreadContext * tc, 157 StaticInstPtr inst = StaticInst::nullStaticInstPtr) 158 { 159 panic("Unimplemented instruction!"); 160 } 161 }; 162 163 static inline Fault genMachineCheckFault() 164 { 165 panic("Machine check fault not implemented in x86!\n"); 166 } 167 168 // Below is a summary of the interrupt/exception information in the 169 // architecture manuals. 170 171 // Class | Type | vector | Cause | mnem 172 //------------------------------------------------------------------------ 173 //Contrib Fault 0 Divide-by-Zero-Error #DE 174 //Benign Either 1 Debug #DB 175 //Benign Interrupt 2 Non-Maskable-Interrupt #NMI 176 //Benign Trap 3 Breakpoint #BP 177 //Benign Trap 4 Overflow #OF 178 //Benign Fault 5 Bound-Range #BR 179 //Benign Fault 6 Invalid-Opcode #UD 180 //Benign Fault 7 Device-Not-Available #NM 181 //Benign Abort 8 Double-Fault #DF 182 // 9 Coprocessor-Segment-Overrun 183 //Contrib Fault 10 Invalid-TSS #TS 184 //Contrib Fault 11 Segment-Not-Present #NP 185 //Contrib Fault 12 Stack #SS 186 //Contrib Fault 13 General-Protection #GP 187 //Either Fault 14 Page-Fault #PF 188 // 15 Reserved 189 //Benign Fault 16 x87 Floating-Point Exception Pending #MF 190 //Benign Fault 17 Alignment-Check #AC 191 //Benign Abort 18 Machine-Check #MC 192 //Benign Fault 19 SIMD Floating-Point #XF 193 // 20-29 Reserved 194 //Contrib ? 30 Security Exception #SX 195 // 31 Reserved 196 //Benign Interrupt 0-255 External Interrupts #INTR 197 //Benign Interrupt 0-255 Software Interrupts INTn 198 199 class DivideByZero : public X86Fault 200 { 201 public: 202 DivideByZero() : 203 X86Fault("Divide-by-Zero-Error", "#DE", 0) 204 {} 205 }; 206 207 class DebugException : public X86FaultBase 208 { 209 public: 210 DebugException() : 211 X86FaultBase("Debug", "#DB", 1) 212 {} 213 }; 214 215 class NonMaskableInterrupt : public X86Interrupt 216 { 217 public: 218 NonMaskableInterrupt(uint8_t _vector) : 219 X86Interrupt("Non Maskable Interrupt", "#NMI", 2, _vector) 220 {} 221 }; 222 223 class Breakpoint : public X86Trap 224 { 225 public: 226 Breakpoint() : 227 X86Trap("Breakpoint", "#BP", 3) 228 {} 229 }; 230 231 class OverflowTrap : public X86Trap 232 { 233 public: 234 OverflowTrap() : 235 X86Trap("Overflow", "#OF", 4) 236 {} 237 }; 238 239 class BoundRange : public X86Fault 240 { 241 public: 242 BoundRange() : 243 X86Fault("Bound-Range", "#BR", 5) 244 {} 245 }; 246 247 class InvalidOpcode : public X86Fault 248 { 249 public: 250 InvalidOpcode() : 251 X86Fault("Invalid-Opcode", "#UD", 6) 252 {} 253 254#if !FULL_SYSTEM 255 void invoke(ThreadContext * tc, 256 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 257#endif 258 }; 259 260 class DeviceNotAvailable : public X86Fault 261 { 262 public: 263 DeviceNotAvailable() : 264 X86Fault("Device-Not-Available", "#NM", 7) 265 {} 266 }; 267 268 class DoubleFault : public X86Abort 269 { 270 public: 271 DoubleFault() : 272 X86Abort("Double-Fault", "#DF", 8, 0) 273 {} 274 }; 275 276 class InvalidTSS : public X86Fault 277 { 278 public: 279 InvalidTSS(uint32_t _errorCode) : 280 X86Fault("Invalid-TSS", "#TS", 10, _errorCode) 281 {} 282 }; 283 284 class SegmentNotPresent : public X86Fault 285 { 286 public: 287 SegmentNotPresent(uint32_t _errorCode) : 288 X86Fault("Segment-Not-Present", "#NP", 11, _errorCode) 289 {} 290 }; 291 292 class StackFault : public X86Fault 293 { 294 public: 295 StackFault(uint32_t _errorCode) : 296 X86Fault("Stack", "#SS", 12, _errorCode) 297 {} 298 }; 299 300 class GeneralProtection : public X86Fault 301 { 302 public: 303 GeneralProtection(uint32_t _errorCode) : 304 X86Fault("General-Protection", "#GP", 13, _errorCode) 305 {} 306 }; 307 308 class PageFault : public X86Fault 309 { 310 protected: 311 BitUnion32(PageFaultErrorCode) 312 Bitfield<0> present; 313 Bitfield<1> write; 314 Bitfield<2> user; 315 Bitfield<3> reserved; 316 Bitfield<4> fetch; 317 EndBitUnion(PageFaultErrorCode) 318 319 Addr addr; 320 321 public: 322 PageFault(Addr _addr, uint32_t _errorCode) : 323 X86Fault("Page-Fault", "#PF", 14, _errorCode), addr(_addr) 324 {} 325 326 PageFault(Addr _addr, bool present, BaseTLB::Mode mode, 327 bool user, bool reserved) : 328 X86Fault("Page-Fault", "#PF", 14, 0), addr(_addr) 329 { 330 PageFaultErrorCode code = 0; 331 code.present = present; 332 code.write = (mode == BaseTLB::Write); 333 code.user = user; 334 code.reserved = reserved; 335 code.fetch = (mode == BaseTLB::Execute); 336 errorCode = code; 337 } 338 339 void invoke(ThreadContext * tc, 340 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 341 342#if FULL_SYSTEM 343 virtual std::string describe() const; 344#endif 345 }; 346 347 class X87FpExceptionPending : public X86Fault 348 { 349 public: 350 X87FpExceptionPending() : 351 X86Fault("x87 Floating-Point Exception Pending", "#MF", 16) 352 {} 353 }; 354 355 class AlignmentCheck : public X86Fault 356 { 357 public: 358 AlignmentCheck() : 359 X86Fault("Alignment-Check", "#AC", 17, 0) 360 {} 361 }; 362 363 class MachineCheck : public X86Abort 364 { 365 public: 366 MachineCheck() : 367 X86Abort("Machine-Check", "#MC", 18) 368 {} 369 }; 370 371 class SIMDFloatingPointFault : public X86Fault 372 { 373 public: 374 SIMDFloatingPointFault() : 375 X86Fault("SIMD Floating-Point", "#XF", 19) 376 {} 377 }; 378 379 class SecurityException : public X86FaultBase 380 { 381 public: 382 SecurityException() : 383 X86FaultBase("Security Exception", "#SX", 30) 384 {} 385 }; 386 387 class ExternalInterrupt : public X86Interrupt 388 { 389 public: 390 ExternalInterrupt(uint8_t _vector) : 391 X86Interrupt("External Interrupt", "#INTR", _vector) 392 {} 393 }; 394 395 class SystemManagementInterrupt : public X86Interrupt 396 { 397 public: 398 SystemManagementInterrupt() : 399 X86Interrupt("System Management Interrupt", "#SMI", 0) 400 {} 401 }; 402 403 class InitInterrupt : public X86Interrupt 404 { 405 public: 406 InitInterrupt(uint8_t _vector) : 407 X86Interrupt("INIT Interrupt", "#INIT", _vector) 408 {} 409 410 void invoke(ThreadContext * tc, 411 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 412 }; 413 414 class StartupInterrupt : public X86Interrupt 415 { 416 public: 417 StartupInterrupt(uint8_t _vector) : 418 X86Interrupt("Startup Interrupt", "#SIPI", _vector) 419 {} 420 421 void invoke(ThreadContext * tc, 422 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 423 }; 424 425 class SoftwareInterrupt : public X86Interrupt 426 { 427 public: 428 SoftwareInterrupt(uint8_t _vector) : 429 X86Interrupt("Software Interrupt", "#INTR", _vector) 430 {} 431 432 bool isSoft() 433 { 434 return true; 435 } 436 }; 437}; 438 439#endif // __ARCH_X86_FAULTS_HH__ 440