faults.hh revision 7678:f19b6a3a8cec
1/* 2 * Copyright (c) 2010 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) 2003-2005 The Regents of The University of Michigan 15 * Copyright (c) 2007-2008 The Florida State University 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Ali Saidi 42 * Gabe Black 43 */ 44 45#ifndef __ARM_FAULTS_HH__ 46#define __ARM_FAULTS_HH__ 47 48#include "arch/arm/miscregs.hh" 49#include "arch/arm/types.hh" 50#include "config/full_system.hh" 51#include "sim/faults.hh" 52#include "base/misc.hh" 53 54// The design of the "name" and "vect" functions is in sim/faults.hh 55 56namespace ArmISA 57{ 58typedef const Addr FaultOffset; 59 60class ArmFault : public FaultBase 61{ 62 protected: 63 Addr getVector(ThreadContext *tc); 64 65 public: 66 enum StatusEncoding 67 { 68 // Fault Status register encodings 69 // ARM ARM B3.9.4 70 AlignmentFault = 0x1, 71 DebugEvent = 0x2, 72 AccessFlag0 = 0x3, 73 InstructionCacheMaintenance = 0x4, 74 Translation0 = 0x5, 75 AccessFlag1 = 0x6, 76 Translation1 = 0x7, 77 SynchronousExternalAbort0 = 0x8, 78 Domain0 = 0x9, 79 SynchronousExternalAbort1 = 0x8, 80 Domain1 = 0xb, 81 TranslationTableWalkExtAbt0 = 0xc, 82 Permission0 = 0xd, 83 TranslationTableWalkExtAbt1 = 0xe, 84 Permission1 = 0xf, 85 AsynchronousExternalAbort = 0x16, 86 MemoryAccessAsynchronousParityError = 0x18, 87 MemoryAccessSynchronousParityError = 0x19, 88 TranslationTableWalkPrtyErr0 = 0x1c, 89 TranslationTableWalkPrtyErr1 = 0x1e, 90 91 // not a real fault. This is a status code 92 // to allow the translation function to inform 93 // the memory access function not to proceed 94 // for a Prefetch that misses in the TLB. 95 PrefetchTLBMiss 96 }; 97 98 struct FaultVals 99 { 100 const FaultName name; 101 const FaultOffset offset; 102 const OperatingMode nextMode; 103 const uint8_t armPcOffset; 104 const uint8_t thumbPcOffset; 105 const bool abortDisable; 106 const bool fiqDisable; 107 FaultStat count; 108 }; 109 110#if FULL_SYSTEM 111 void invoke(ThreadContext *tc, 112 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 113#endif 114 virtual FaultStat& countStat() = 0; 115 virtual FaultOffset offset() = 0; 116 virtual OperatingMode nextMode() = 0; 117 virtual uint8_t armPcOffset() = 0; 118 virtual uint8_t thumbPcOffset() = 0; 119 virtual bool abortDisable() = 0; 120 virtual bool fiqDisable() = 0; 121}; 122 123template<typename T> 124class ArmFaultVals : public ArmFault 125{ 126 protected: 127 static FaultVals vals; 128 129 public: 130 FaultName name() const { return vals.name; } 131 FaultStat & countStat() {return vals.count;} 132 FaultOffset offset() { return vals.offset; } 133 OperatingMode nextMode() { return vals.nextMode; } 134 uint8_t armPcOffset() { return vals.armPcOffset; } 135 uint8_t thumbPcOffset() { return vals.thumbPcOffset; } 136 bool abortDisable() { return vals.abortDisable; } 137 bool fiqDisable() { return vals.fiqDisable; } 138}; 139 140class Reset : public ArmFaultVals<Reset> 141#if FULL_SYSTEM 142{ 143 public: 144 void invoke(ThreadContext *tc, 145 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 146}; 147#else 148{}; 149#endif //FULL_SYSTEM 150 151class UndefinedInstruction : public ArmFaultVals<UndefinedInstruction> 152{ 153#if !FULL_SYSTEM 154 protected: 155 ExtMachInst machInst; 156 bool unknown; 157 const char *mnemonic; 158 bool disabled; 159 160 public: 161 UndefinedInstruction(ExtMachInst _machInst, 162 bool _unknown, 163 const char *_mnemonic = NULL, 164 bool _disabled = false) : 165 machInst(_machInst), unknown(_unknown), 166 mnemonic(_mnemonic), disabled(_disabled) 167 { 168 } 169 170 void invoke(ThreadContext *tc, 171 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 172#endif 173}; 174 175class SupervisorCall : public ArmFaultVals<SupervisorCall> 176{ 177#if !FULL_SYSTEM 178 protected: 179 ExtMachInst machInst; 180 181 public: 182 SupervisorCall(ExtMachInst _machInst) : machInst(_machInst) 183 {} 184 185 void invoke(ThreadContext *tc, 186 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 187#endif 188}; 189 190template <class T> 191class AbortFault : public ArmFaultVals<T> 192{ 193 protected: 194 Addr faultAddr; 195 bool write; 196 uint8_t domain; 197 uint8_t status; 198 199 public: 200 AbortFault(Addr _faultAddr, bool _write, 201 uint8_t _domain, uint8_t _status) : 202 faultAddr(_faultAddr), write(_write), 203 domain(_domain), status(_status) 204 {} 205 206 void invoke(ThreadContext *tc, 207 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 208}; 209 210class PrefetchAbort : public AbortFault<PrefetchAbort> 211{ 212 public: 213 static const MiscRegIndex FsrIndex = MISCREG_IFSR; 214 static const MiscRegIndex FarIndex = MISCREG_IFAR; 215 216 PrefetchAbort(Addr _addr, uint8_t _status) : 217 AbortFault<PrefetchAbort>(_addr, false, 0, _status) 218 {} 219}; 220 221class DataAbort : public AbortFault<DataAbort> 222{ 223 public: 224 static const MiscRegIndex FsrIndex = MISCREG_DFSR; 225 static const MiscRegIndex FarIndex = MISCREG_DFAR; 226 227 DataAbort(Addr _addr, uint8_t _domain, bool _write, uint8_t _status) : 228 AbortFault<DataAbort>(_addr, _write, _domain, _status) 229 {} 230}; 231 232class Interrupt : public ArmFaultVals<Interrupt> {}; 233class FastInterrupt : public ArmFaultVals<FastInterrupt> {}; 234 235// A fault that flushes the pipe, excluding the faulting instructions 236class FlushPipe : public ArmFaultVals<FlushPipe> 237{ 238 public: 239 FlushPipe() {} 240 void invoke(ThreadContext *tc, 241 StaticInstPtr inst = StaticInst::nullStaticInstPtr); 242}; 243 244static inline Fault genMachineCheckFault() 245{ 246 return new Reset(); 247} 248 249} // ArmISA namespace 250 251#endif // __ARM_FAULTS_HH__ 252