xref: /gem5/src/arch/mips/isa/formats/trap.isa

// -*- mode:c++ -*-

// Copyright (c) 2007 MIPS Technologies, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Korey Sewell
//          Jaidev Patwardhan

////////////////////////////////////////////////////////////////////
//
// Trap instructions
//

output header {{
        /**
         * Base class for integer operations.
         */
        class Trap : public MipsStaticInst
        {
                protected:

                /// Constructor
                Trap(const char *mnem, MachInst _machInst, OpClass __opClass) : MipsStaticInst(mnem, _machInst, __opClass)
                {
                }

                std::string generateDisassembly(
                        Addr pc, const SymbolTable *symtab) const override;
        };
        class TrapImm : public MipsStaticInst
        {
                protected:

                int16_t imm;

                /// Constructor
                TrapImm(const char *mnem, MachInst _machInst, OpClass __opClass) :
                    MipsStaticInst(mnem, _machInst, __opClass),imm(INTIMM)
                {
                }

                std::string generateDisassembly(
                        Addr pc, const SymbolTable *symtab) const override;
        };

}};

output decoder {{
        std::string Trap::generateDisassembly(Addr pc, const SymbolTable *symtab) const
        {
                return "Disassembly of trap instruction\n";
        }
        std::string TrapImm::generateDisassembly(Addr pc, const SymbolTable *symtab) const
        {
                return "Disassembly of trap instruction\n";
        }
}};

def template TrapExecute {{
        //Edit This Template When Traps Are Implemented
        Fault %(class_name)s::execute(
            ExecContext *xc, Trace::InstRecord *traceData) const
        {
                //Write the resulting state to the execution context
                %(op_wb)s;

                //Call into the trap handler with the appropriate fault
                return No_Fault;
        }
}};
def format Trap(code, *flags) {{

        code ='bool cond;\n' + code
        code += 'if (cond) {\n'
        code += 'fault = std::make_shared<TrapFault>();\n};'

        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};
def format TrapImm(code, *flags) {{

        code ='bool cond;\n' + code
        code += 'if (cond) {\n'
        code += 'fault = std::make_shared<TrapFault>();\n};'
        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};