arch/sparc/isa/formats/trap.isa

   1 ////////////////////////////////////////////////////////////////////
   2 //
   3 // Trap instructions
   4 //
   5
   6 output header {{
   7         /**
   8          * Base class for trap instructions,
   9          * or instructions that always fault.
  10          */
  11         class Trap : public SparcStaticInst
  12         {
  13           protected:
  14
  15             // Constructor
  16             Trap(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
  17                 SparcStaticInst(mnem, _machInst, __opClass), trapNum(SW_TRAP)
  18             {
  19             }
  20
  21             std::string generateDisassembly(Addr pc,
  22                     const SymbolTable *symtab) const;
  23
  24             int trapNum;
  25         };
  26 }};
  27
  28 output decoder {{
  29         std::string Trap::generateDisassembly(Addr pc,
  30                 const SymbolTable *symtab) const
  31         {
  32             std::stringstream response;
  33
  34             printMnemonic(response, mnemonic);
  35             ccprintf(response, " ");
  36             printReg(response, _srcRegIdx[0]);
  37             ccprintf(response, ", 0x%x", trapNum);
  38             ccprintf(response, ", or ");
  39             printReg(response, _srcRegIdx[1]);
  40             return response.str();
  41         }
  42 }};
  43
  44 def template TrapExecute {{
  45         Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
  46                 Trace::InstRecord *traceData) const
  47         {
  48             Fault fault = NoFault;
  49             %(op_decl)s;
  50             %(op_rd)s;
  51             %(code)s
  52             return fault;
  53         }
  54 }};
  55
  56 def format Trap(code, *opt_flags) {{
  57         orig_code = code
  58         cblk = CodeBlock(code)
  59         iop = InstObjParams(name, Name, 'Trap', cblk, opt_flags)
  60         header_output = BasicDeclare.subst(iop)
  61         decoder_output = BasicConstructor.subst(iop)
  62         decode_block = BasicDecode.subst(iop)
  63         exec_output = TrapExecute.subst(iop)
  64 }};