unimp.isa revision 5268:5bfc53fe60e7
1// -*- mode:c++ -*- 2 3// Copyright (c) 2007 MIPS Technologies, Inc. 4// All rights reserved. 5// 6// Redistribution and use in source and binary forms, with or without 7// modification, are permitted provided that the following conditions are 8// met: redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer; 10// redistributions in binary form must reproduce the above copyright 11// notice, this list of conditions and the following disclaimer in the 12// documentation and/or other materials provided with the distribution; 13// neither the name of the copyright holders nor the names of its 14// contributors may be used to endorse or promote products derived from 15// this software without specific prior written permission. 16// 17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28// 29// Authors: Korey Sewell 30 31//////////////////////////////////////////////////////////////////// 32// 33// Unimplemented instructions 34// 35 36output header {{ 37 /** 38 * Static instruction class for unimplemented instructions that 39 * cause simulator termination. Note that these are recognized 40 * (legal) instructions that the simulator does not support; the 41 * 'Unknown' class is used for unrecognized/illegal instructions. 42 * This is a leaf class. 43 */ 44 class FailUnimplemented : public MipsStaticInst 45 { 46 public: 47 /// Constructor 48 FailUnimplemented(const char *_mnemonic, MachInst _machInst) 49 : MipsStaticInst(_mnemonic, _machInst, No_OpClass) 50 { 51 // don't call execute() (which panics) if we're on a 52 // speculative path 53 flags[IsNonSpeculative] = true; 54 } 55 56 %(BasicExecDeclare)s 57 58 std::string 59 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 60 }; 61 class CP0Unimplemented : public MipsStaticInst 62 { 63 public: 64 /// Constructor 65 CP0Unimplemented(const char *_mnemonic, MachInst _machInst) 66 : MipsStaticInst(_mnemonic, _machInst, No_OpClass) 67 { 68 // don't call execute() (which panics) if we're on a 69 // speculative path 70 flags[IsNonSpeculative] = true; 71 } 72 73 %(BasicExecDeclare)s 74 75 std::string 76 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 77 }; 78 class CP1Unimplemented : public MipsStaticInst 79 { 80 public: 81 /// Constructor 82 CP1Unimplemented(const char *_mnemonic, MachInst _machInst) 83 : MipsStaticInst(_mnemonic, _machInst, No_OpClass) 84 { 85 // don't call execute() (which panics) if we're on a 86 // speculative path 87 flags[IsNonSpeculative] = true; 88 } 89 90 %(BasicExecDeclare)s 91 92 std::string 93 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 94 }; 95 class CP2Unimplemented : public MipsStaticInst 96 { 97 public: 98 /// Constructor 99 CP2Unimplemented(const char *_mnemonic, MachInst _machInst) 100 : MipsStaticInst(_mnemonic, _machInst, No_OpClass) 101 { 102 // don't call execute() (which panics) if we're on a 103 // speculative path 104 flags[IsNonSpeculative] = true; 105 } 106 107 %(BasicExecDeclare)s 108 109 std::string 110 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 111 }; 112 113 /** 114 * Base class for unimplemented instructions that cause a warning 115 * to be printed (but do not terminate simulation). This 116 * implementation is a little screwy in that it will print a 117 * warning for each instance of a particular unimplemented machine 118 * instruction, not just for each unimplemented opcode. Should 119 * probably make the 'warned' flag a static member of the derived 120 * class. 121 */ 122 class WarnUnimplemented : public MipsStaticInst 123 { 124 private: 125 /// Have we warned on this instruction yet? 126 mutable bool warned; 127 128 public: 129 /// Constructor 130 WarnUnimplemented(const char *_mnemonic, MachInst _machInst) 131 : MipsStaticInst(_mnemonic, _machInst, No_OpClass), warned(false) 132 { 133 // don't call execute() (which panics) if we're on a 134 // speculative path 135 flags[IsNonSpeculative] = true; 136 } 137 138 %(BasicExecDeclare)s 139 140 std::string 141 generateDisassembly(Addr pc, const SymbolTable *symtab) const; 142 }; 143}}; 144 145output decoder {{ 146 std::string 147 FailUnimplemented::generateDisassembly(Addr pc, 148 const SymbolTable *symtab) const 149 { 150 return csprintf("%-10s (unimplemented)", mnemonic); 151 } 152 153 std::string 154 CP0Unimplemented::generateDisassembly(Addr pc, 155 const SymbolTable *symtab) const 156 { 157 return csprintf("%-10s (unimplemented)", mnemonic); 158 } 159 160 std::string 161 CP1Unimplemented::generateDisassembly(Addr pc, 162 const SymbolTable *symtab) const 163 { 164 return csprintf("%-10s (unimplemented)", mnemonic); 165 } 166 std::string 167 CP2Unimplemented::generateDisassembly(Addr pc, 168 const SymbolTable *symtab) const 169 { 170 return csprintf("%-10s (unimplemented)", mnemonic); 171 } 172 173 std::string 174 WarnUnimplemented::generateDisassembly(Addr pc, 175 const SymbolTable *symtab) const 176 { 177 return csprintf("%-10s (unimplemented)", mnemonic); 178 } 179}}; 180 181output exec {{ 182 Fault 183 FailUnimplemented::execute(%(CPU_exec_context)s *xc, 184 Trace::InstRecord *traceData) const 185 { 186 panic("attempt to execute unimplemented instruction '%s' " 187 "(inst 0x%08x, opcode 0x%x, binary:%s)", mnemonic, machInst, OPCODE, 188 inst2string(machInst)); 189 return new UnimplementedOpcodeFault; 190 } 191 192 Fault 193 CP0Unimplemented::execute(%(CPU_exec_context)s *xc, 194 Trace::InstRecord *traceData) const 195 { 196#if FULL_SYSTEM 197 if (!isCoprocessorEnabled(xc, 0)) { 198 return new CoprocessorUnusableFault(0); 199 } 200 return new ReservedInstructionFault; 201#else 202 panic("attempt to execute unimplemented instruction '%s' " 203 "(inst 0x%08x, opcode 0x%x, binary:%s)", mnemonic, machInst, OPCODE, 204 inst2string(machInst)); 205 return new UnimplementedOpcodeFault; 206#endif 207 } 208 209 Fault 210 CP1Unimplemented::execute(%(CPU_exec_context)s *xc, 211 Trace::InstRecord *traceData) const 212 { 213#if FULL_SYSTEM 214 if (!isCoprocessorEnabled(xc, 1)) { 215 return new CoprocessorUnusableFault(1); 216 } 217 return new ReservedInstructionFault; 218#else 219 panic("attempt to execute unimplemented instruction '%s' " 220 "(inst 0x%08x, opcode 0x%x, binary:%s)", mnemonic, machInst, OPCODE, 221 inst2string(machInst)); 222 return new UnimplementedOpcodeFault; 223#endif 224 } 225 Fault 226 CP2Unimplemented::execute(%(CPU_exec_context)s *xc, 227 Trace::InstRecord *traceData) const 228 { 229#if FULL_SYSTEM 230 if (!isCoprocessorEnabled(xc, 2)) { 231 return new CoprocessorUnusableFault(2); 232 } 233 return new ReservedInstructionFault; 234#else 235 panic("attempt to execute unimplemented instruction '%s' " 236 "(inst 0x%08x, opcode 0x%x, binary:%s)", mnemonic, machInst, OPCODE, 237 inst2string(machInst)); 238 return new UnimplementedOpcodeFault; 239#endif 240 } 241 242 Fault 243 WarnUnimplemented::execute(%(CPU_exec_context)s *xc, 244 Trace::InstRecord *traceData) const 245 { 246 if (!warned) { 247 warn("\tinstruction '%s' unimplemented\n", mnemonic); 248 warned = true; 249 } 250 251 return NoFault; 252 } 253}}; 254 255 256def format FailUnimpl() {{ 257 iop = InstObjParams(name, 'FailUnimplemented') 258 decode_block = BasicDecodeWithMnemonic.subst(iop) 259 260}}; 261def format CP0Unimpl() {{ 262 iop = InstObjParams(name, 'CP0Unimplemented') 263 decode_block = BasicDecodeWithMnemonic.subst(iop) 264}}; 265def format CP1Unimpl() {{ 266 iop = InstObjParams(name, 'CP1Unimplemented') 267 decode_block = BasicDecodeWithMnemonic.subst(iop) 268}}; 269def format CP2Unimpl() {{ 270 iop = InstObjParams(name, 'CP2Unimplemented') 271 decode_block = BasicDecodeWithMnemonic.subst(iop) 272}}; 273def format WarnUnimpl() {{ 274 iop = InstObjParams(name, 'WarnUnimplemented') 275 decode_block = BasicDecodeWithMnemonic.subst(iop) 276}}; 277 278