trap.isa revision 2754:e3d023bc752c 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2006 The Regents of The University of Michigan
4// All rights reserved.
5//
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7// modification, are permitted provided that the following conditions are
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15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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28//
29// Authors: Korey Sewell
30
31////////////////////////////////////////////////////////////////////
32//
33// Trap instructions
34//
35
36output header {{
37        /**
38         * Base class for integer operations.
39         */
40        class Trap : public MipsStaticInst
41        {
42                protected:
43
44                /// Constructor
45                Trap(const char *mnem, MachInst _machInst, OpClass __opClass) : MipsStaticInst(mnem, _machInst, __opClass)
46                {
47                }
48
49                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
50        };
51}};
52
53output decoder {{
54        std::string Trap::generateDisassembly(Addr pc, const SymbolTable *symtab) const
55        {
56                return "Disassembly of trap instruction\n";
57        }
58}};
59
60def template TrapExecute {{
61        //Edit This Template When Traps Are Implemented
62        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
63        {
64                //Write the resulting state to the execution context
65                %(op_wb)s;
66
67                //Call into the trap handler with the appropriate fault
68                return No_Fault;
69        }
70}};
71
72def format Trap(code, *flags) {{
73        code = 'warn(\"'
74        code += 'Trap Exception Handler Is Currently Not Implemented.'
75        code += '\");'
76        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
77        header_output = BasicDeclare.subst(iop)
78        decoder_output = BasicConstructor.subst(iop)
79        decode_block = BasicDecode.subst(iop)
80        exec_output = BasicExecute.subst(iop)
81}};
82