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40 #ifndef __ARCH_X86_FAULTS_HH__
41 #define __ARCH_X86_FAULTS_HH__
43 #include "base/bitunion.hh"
44 #include "base/misc.hh"
45 #include "sim/faults.hh"
52 // Base class for all x86 "faults" where faults is in the m5 sense
53 class X86FaultBase : public FaultBase
56 const char * faultName;
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)
68 const char * name() const
73 virtual bool isBenign()
78 virtual const char * mnemonic() const
89 void invoke(ThreadContext * tc);
91 virtual std::string describe() const;
95 // Base class for x86 faults which behave as if the underlying instruction
97 class X86Fault : public X86FaultBase
100 X86Fault(const char * name, const char * mnem,
101 const uint8_t vector, uint64_t _errorCode = (uint64_t)-1)
102 : X86FaultBase(name, mnem, vector, _errorCode)
106 // Base class for x86 traps which behave as if the underlying instruction
108 class X86Trap : public X86FaultBase
111 X86Trap(const char * name, const char * mnem,
112 const uint8_t vector, uint64_t _errorCode = (uint64_t)-1)
113 : X86FaultBase(name, mnem, vector, _errorCode)
117 void invoke(ThreadContext * tc);
121 // Base class for x86 aborts which seem to be catastrophic failures.
122 class X86Abort : public X86FaultBase
125 X86Abort(const char * name, const char * mnem,
126 const uint8_t vector, uint64_t _errorCode = (uint64_t)-1)
127 : X86FaultBase(name, mnem, vector, _errorCode)
131 void invoke(ThreadContext * tc);
135 // Base class for x86 interrupts.
136 class X86Interrupt : public X86FaultBase
139 X86Interrupt(const char * name, const char * mnem,
140 const uint8_t _vector, uint64_t _errorCode = (uint64_t)-1)
141 : X86FaultBase(name, mnem, _vector, _errorCode)
145 class UnimpInstFault : public FaultBase
148 const char * name() const
150 return "unimplemented_micro";
153 void invoke(ThreadContext * tc)
155 panic("Unimplemented instruction!");
159 static inline Fault genMachineCheckFault()
161 panic("Machine check fault not implemented in x86!\n");
164 // Below is a summary of the interrupt/exception information in the
165 // architecture manuals.
167 // Class | Type | vector | Cause | mnem
168 //------------------------------------------------------------------------
169 //Contrib Fault 0 Divide-by-Zero-Error #DE
170 //Benign Either 1 Debug #DB
171 //Benign Interrupt 2 Non-Maskable-Interrupt #NMI
172 //Benign Trap 3 Breakpoint #BP
173 //Benign Trap 4 Overflow #OF
174 //Benign Fault 5 Bound-Range #BR
175 //Benign Fault 6 Invalid-Opcode #UD
176 //Benign Fault 7 Device-Not-Available #NM
177 //Benign Abort 8 Double-Fault #DF
178 // 9 Coprocessor-Segment-Overrun
179 //Contrib Fault 10 Invalid-TSS #TS
180 //Contrib Fault 11 Segment-Not-Present #NP
181 //Contrib Fault 12 Stack #SS
182 //Contrib Fault 13 General-Protection #GP
183 //Either Fault 14 Page-Fault #PF
185 //Benign Fault 16 x87 Floating-Point Exception Pending #MF
186 //Benign Fault 17 Alignment-Check #AC
187 //Benign Abort 18 Machine-Check #MC
188 //Benign Fault 19 SIMD Floating-Point #XF
190 //Contrib ? 30 Security Exception #SX
192 //Benign Interrupt 0-255 External Interrupts #INTR
193 //Benign Interrupt 0-255 Software Interrupts INTn
195 class DivideByZero : public X86Fault
199 X86Fault("Divide-by-Zero-Error", "#DE", 0)
203 class DebugException : public X86FaultBase
207 X86FaultBase("Debug", "#DB", 1)
211 class NonMaskableInterrupt : public X86Interrupt
214 NonMaskableInterrupt(uint8_t _vector) :
215 X86Interrupt("Non Maskable Interrupt", "#NMI", 2, _vector)
219 class Breakpoint : public X86Trap
223 X86Trap("Breakpoint", "#BP", 3)
227 class OverflowTrap : public X86Trap
231 X86Trap("Overflow", "#OF", 4)
235 class BoundRange : public X86Fault
239 X86Fault("Bound-Range", "#BR", 5)
243 class InvalidOpcode : public X86Fault
247 X86Fault("Invalid-Opcode", "#UD", 6)
251 class DeviceNotAvailable : public X86Fault
254 DeviceNotAvailable() :
255 X86Fault("Device-Not-Available", "#NM", 7)
259 class DoubleFault : public X86Abort
263 X86Abort("Double-Fault", "#DF", 8, 0)
267 class InvalidTSS : public X86Fault
270 InvalidTSS(uint32_t _errorCode) :
271 X86Fault("Invalid-TSS", "#TS", 10, _errorCode)
275 class SegmentNotPresent : public X86Fault
278 SegmentNotPresent(uint32_t _errorCode) :
279 X86Fault("Segment-Not-Present", "#NP", 11, _errorCode)
283 class StackFault : public X86Fault
286 StackFault(uint32_t _errorCode) :
287 X86Fault("Stack", "#SS", 12, _errorCode)
291 class GeneralProtection : public X86Fault
294 GeneralProtection(uint32_t _errorCode) :
295 X86Fault("General-Protection", "#GP", 13, _errorCode)
299 class PageFault : public X86Fault
302 BitUnion32(PageFaultErrorCode)
306 Bitfield<3> reserved;
308 EndBitUnion(PageFaultErrorCode)
313 PageFault(Addr _addr, uint32_t _errorCode) :
314 X86Fault("Page-Fault", "#PF", 14, _errorCode), addr(_addr)
317 PageFault(Addr _addr, bool present, BaseTLB::Mode mode,
318 bool user, bool reserved) :
319 X86Fault("Page-Fault", "#PF", 14, 0), addr(_addr)
321 PageFaultErrorCode code = 0;
322 code.present = present;
323 code.write = (mode == BaseTLB::Write);
325 code.reserved = reserved;
326 code.fetch = (mode == BaseTLB::Execute);
330 void invoke(ThreadContext * tc);
333 virtual std::string describe() const;
337 class X87FpExceptionPending : public X86Fault
340 X87FpExceptionPending() :
341 X86Fault("x87 Floating-Point Exception Pending", "#MF", 16)
345 class AlignmentCheck : public X86Fault
349 X86Fault("Alignment-Check", "#AC", 17, 0)
353 class MachineCheck : public X86Abort
357 X86Abort("Machine-Check", "#MC", 18)
361 class SIMDFloatingPointFault : public X86Fault
364 SIMDFloatingPointFault() :
365 X86Fault("SIMD Floating-Point", "#XF", 19)
369 class SecurityException : public X86FaultBase
372 SecurityException() :
373 X86FaultBase("Security Exception", "#SX", 30)
377 class ExternalInterrupt : public X86Interrupt
380 ExternalInterrupt(uint8_t _vector) :
381 X86Interrupt("External Interrupt", "#INTR", _vector)
385 class SystemManagementInterrupt : public X86Interrupt
388 SystemManagementInterrupt() :
389 X86Interrupt("System Management Interrupt", "#SMI", 0)
393 class InitInterrupt : public X86Interrupt
396 InitInterrupt(uint8_t _vector) :
397 X86Interrupt("INIT Interrupt", "#INIT", _vector)
400 void invoke(ThreadContext * tc);
403 class StartupInterrupt : public X86Interrupt
406 StartupInterrupt(uint8_t _vector) :
407 X86Interrupt("Startup Interrupt", "#SIPI", _vector)
410 void invoke(ThreadContext * tc);
413 class SoftwareInterrupt : public X86Interrupt
416 SoftwareInterrupt(uint8_t _vector) :
417 X86Interrupt("Software Interrupt", "#INTR", _vector)
427 #endif // __ARCH_X86_FAULTS_HH__