| // -*- 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 |
| |
| //////////////////////////////////////////////////////////////////// |
| // |
| // Unimplemented instructions |
| // |
| |
| output header {{ |
| /** |
| * Static instruction class for unimplemented instructions that |
| * cause simulator termination. Note that these are recognized |
| * (legal) instructions that the simulator does not support; the |
| * 'Unknown' class is used for unrecognized/illegal instructions. |
| * This is a leaf class. |
| */ |
| class FailUnimplemented : public MipsStaticInst |
| { |
| public: |
| /// Constructor |
| FailUnimplemented(const char *_mnemonic, MachInst _machInst) |
| : MipsStaticInst(_mnemonic, _machInst, No_OpClass) |
| { |
| // don't call execute() (which panics) if we're on a |
| // speculative path |
| flags[IsNonSpeculative] = true; |
| } |
| |
| Fault execute(ExecContext *, Trace::InstRecord *) const override; |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| class CP0Unimplemented : public MipsStaticInst |
| { |
| public: |
| /// Constructor |
| CP0Unimplemented(const char *_mnemonic, MachInst _machInst) |
| : MipsStaticInst(_mnemonic, _machInst, No_OpClass) |
| { |
| // don't call execute() (which panics) if we're on a |
| // speculative path |
| flags[IsNonSpeculative] = true; |
| } |
| |
| Fault execute(ExecContext *, Trace::InstRecord *) const override; |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| class CP1Unimplemented : public MipsStaticInst |
| { |
| public: |
| /// Constructor |
| CP1Unimplemented(const char *_mnemonic, MachInst _machInst) |
| : MipsStaticInst(_mnemonic, _machInst, No_OpClass) |
| { |
| // don't call execute() (which panics) if we're on a |
| // speculative path |
| flags[IsNonSpeculative] = true; |
| } |
| |
| Fault execute(ExecContext *, Trace::InstRecord *) const override; |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| class CP2Unimplemented : public MipsStaticInst |
| { |
| public: |
| /// Constructor |
| CP2Unimplemented(const char *_mnemonic, MachInst _machInst) |
| : MipsStaticInst(_mnemonic, _machInst, No_OpClass) |
| { |
| // don't call execute() (which panics) if we're on a |
| // speculative path |
| flags[IsNonSpeculative] = true; |
| } |
| |
| Fault execute(ExecContext *, Trace::InstRecord *) const override; |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| |
| /** |
| * Base class for unimplemented instructions that cause a warning |
| * to be printed (but do not terminate simulation). This |
| * implementation is a little screwy in that it will print a |
| * warning for each instance of a particular unimplemented machine |
| * instruction, not just for each unimplemented opcode. Should |
| * probably make the 'warned' flag a static member of the derived |
| * class. |
| */ |
| class WarnUnimplemented : public MipsStaticInst |
| { |
| private: |
| /// Have we warned on this instruction yet? |
| mutable bool warned; |
| |
| public: |
| /// Constructor |
| WarnUnimplemented(const char *_mnemonic, MachInst _machInst) |
| : MipsStaticInst(_mnemonic, _machInst, No_OpClass), warned(false) |
| { |
| // don't call execute() (which panics) if we're on a |
| // speculative path |
| flags[IsNonSpeculative] = true; |
| } |
| |
| Fault execute(ExecContext *, Trace::InstRecord *) const override; |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| }}; |
| |
| output decoder {{ |
| std::string |
| FailUnimplemented::generateDisassembly(Addr pc, |
| const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s (unimplemented)", mnemonic); |
| } |
| |
| std::string |
| CP0Unimplemented::generateDisassembly(Addr pc, |
| const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s (unimplemented)", mnemonic); |
| } |
| |
| std::string |
| CP1Unimplemented::generateDisassembly(Addr pc, |
| const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s (unimplemented)", mnemonic); |
| } |
| std::string |
| CP2Unimplemented::generateDisassembly(Addr pc, |
| const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s (unimplemented)", mnemonic); |
| } |
| |
| std::string |
| WarnUnimplemented::generateDisassembly(Addr pc, |
| const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s (unimplemented)", mnemonic); |
| } |
| }}; |
| |
| output exec {{ |
| Fault |
| FailUnimplemented::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| panic("attempt to execute unimplemented instruction '%s' " |
| "(inst 0x%08x, opcode 0x%x, binary:%s)", mnemonic, machInst, OPCODE, |
| inst2string(machInst)); |
| return NoFault; |
| } |
| |
| Fault |
| CP0Unimplemented::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| if (FullSystem) { |
| if (!isCoprocessorEnabled(xc, 0)) |
| return std::make_shared<CoprocessorUnusableFault>(0); |
| else |
| return std::make_shared<ReservedInstructionFault>(); |
| } else { |
| panic("attempt to execute unimplemented instruction '%s' " |
| "(inst %#08x, opcode %#x, binary:%s)", |
| mnemonic, machInst, OPCODE, inst2string(machInst)); |
| return NoFault; |
| } |
| } |
| |
| Fault |
| CP1Unimplemented::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| if (FullSystem) { |
| if (!isCoprocessorEnabled(xc, 1)) |
| return std::make_shared<CoprocessorUnusableFault>(1); |
| else |
| return std::make_shared<ReservedInstructionFault>(); |
| } else { |
| panic("attempt to execute unimplemented instruction '%s' " |
| "(inst %#08x, opcode %#x, binary:%s)", |
| mnemonic, machInst, OPCODE, inst2string(machInst)); |
| return NoFault; |
| } |
| } |
| |
| Fault |
| CP2Unimplemented::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| if (FullSystem) { |
| if (!isCoprocessorEnabled(xc, 2)) |
| return std::make_shared<CoprocessorUnusableFault>(2); |
| else |
| return std::make_shared<ReservedInstructionFault>(); |
| } else { |
| panic("attempt to execute unimplemented instruction '%s' " |
| "(inst %#08x, opcode %#x, binary:%s)", |
| mnemonic, machInst, OPCODE, inst2string(machInst)); |
| return NoFault; |
| } |
| } |
| |
| Fault |
| WarnUnimplemented::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| if (!warned) { |
| warn("\tinstruction '%s' unimplemented\n", mnemonic); |
| warned = true; |
| } |
| |
| return NoFault; |
| } |
| }}; |
| |
| |
| def format FailUnimpl() {{ |
| iop = InstObjParams(name, 'FailUnimplemented') |
| decode_block = BasicDecodeWithMnemonic.subst(iop) |
| |
| }}; |
| def format CP0Unimpl() {{ |
| iop = InstObjParams(name, 'CP0Unimplemented') |
| decode_block = BasicDecodeWithMnemonic.subst(iop) |
| }}; |
| def format CP1Unimpl() {{ |
| iop = InstObjParams(name, 'CP1Unimplemented') |
| decode_block = BasicDecodeWithMnemonic.subst(iop) |
| }}; |
| def format CP2Unimpl() {{ |
| iop = InstObjParams(name, 'CP2Unimplemented') |
| decode_block = BasicDecodeWithMnemonic.subst(iop) |
| }}; |
| def format WarnUnimpl() {{ |
| iop = InstObjParams(name, 'WarnUnimplemented') |
| decode_block = BasicDecodeWithMnemonic.subst(iop) |
| }}; |
| |
