src/arch/mips/isa/formats/unknown.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2006 The Regents of The University of Michigan
   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 // Unknown instructions
  34 //
  35
  36 output header {{
  37     /**
  38      * Static instruction class for unknown (illegal) instructions.
  39      * These cause simulator termination if they are executed in a
  40      * non-speculative mode.  This is a leaf class.
  41      */
  42     class Unknown : public MipsStaticInst
  43     {
  44       public:
  45         /// Constructor
  46         Unknown(MachInst _machInst)
  47             : MipsStaticInst("unknown", _machInst, No_OpClass)
  48         {
  49             // don't call execute() (which panics) if we're on a
  50             // speculative path
  51             flags[IsNonSpeculative] = true;
  52         }
  53
  54         %(BasicExecDeclare)s
  55
  56         std::string
  57         generateDisassembly(Addr pc, const SymbolTable *symtab) const;
  58     };
  59 }};
  60
  61 output decoder {{
  62     std::string
  63     Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
  64     {
  65         return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
  66                         "unknown", machInst, OPCODE, inst2string(machInst));
  67     }
  68 }};
  69
  70 output exec {{
  71     Fault
  72     Unknown::execute(CPU_EXEC_CONTEXT *xc,
  73                      Trace::InstRecord *traceData) const
  74     {
  75         return new ReservedInstructionFault;
  76     }
  77 }};
  78
  79 def format Unknown() {{
  80     decode_block = 'return new Unknown(machInst);\n'
  81 }};
  82