src/arch/mips/isa/formats/trap.isa

   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
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  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 //          Jaidev Patwardhan
  31
  32 ////////////////////////////////////////////////////////////////////
  33 //
  34 // Trap instructions
  35 //
  36
  37 output header {{
  38         /**
  39          * Base class for integer operations.
  40          */
  41         class Trap : public MipsStaticInst
  42         {
  43                 protected:
  44
  45                 /// Constructor
  46                 Trap(const char *mnem, MachInst _machInst, OpClass __opClass) : MipsStaticInst(mnem, _machInst, __opClass)
  47                 {
  48                 }
  49
  50                 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
  51         };
  52         class TrapImm : public MipsStaticInst
  53         {
  54                 protected:
  55
  56                 int16_t imm;
  57
  58                 /// Constructor
  59                 TrapImm(const char *mnem, MachInst _machInst, OpClass __opClass) :
  60                     MipsStaticInst(mnem, _machInst, __opClass),imm(INTIMM)
  61                 {
  62                 }
  63
  64                 std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
  65
  66
  67         };
  68
  69 }};
  70
  71 output decoder {{
  72         std::string Trap::generateDisassembly(Addr pc, const SymbolTable *symtab) const
  73         {
  74                 return "Disassembly of trap instruction\n";
  75         }
  76         std::string TrapImm::generateDisassembly(Addr pc, const SymbolTable *symtab) const
  77         {
  78                 return "Disassembly of trap instruction\n";
  79         }
  80 }};
  81
  82 def template TrapExecute {{
  83         //Edit This Template When Traps Are Implemented
  84         Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
  85         {
  86                 //Write the resulting state to the execution context
  87                 %(op_wb)s;
  88
  89                 //Call into the trap handler with the appropriate fault
  90                 return No_Fault;
  91         }
  92 }};
  93 def format Trap(code, *flags) {{
  94
  95         code ='bool cond;\n' + code
  96         code += 'if (cond) {\n'
  97         code += 'fault = new TrapFault();\n};'
  98
  99         iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
 100         header_output = BasicDeclare.subst(iop)
 101         decoder_output = BasicConstructor.subst(iop)
 102         decode_block = BasicDecode.subst(iop)
 103         exec_output = BasicExecute.subst(iop)
 104 }};
 105 def format TrapImm(code, *flags) {{
 106
 107         code ='bool cond;\n' + code
 108         code += 'if (cond) {\n'
 109         code += 'fault = new TrapFault();\n};'
 110         iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
 111         header_output = BasicDeclare.subst(iop)
 112         decoder_output = BasicConstructor.subst(iop)
 113         decode_block = BasicDecode.subst(iop)
 114         exec_output = BasicExecute.subst(iop)
 115 }};