trap.isa revision 5222:bb733a878f85 
1// -*- mode:c++ -*-
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34
35//Authors: Korey L. Sewell
36//         Jaidev Patwardhan
37
38////////////////////////////////////////////////////////////////////
39//
40// Trap instructions
41//
42
43output header {{
44        /**
45         * Base class for integer operations.
46         */
47        class Trap : public MipsStaticInst
48        {
49                protected:
50
51                /// Constructor
52                Trap(const char *mnem, MachInst _machInst, OpClass __opClass) : MipsStaticInst(mnem, _machInst, __opClass)
53                {
54                }
55
56                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
57        };
58        class TrapImm : public MipsStaticInst
59        {
60                protected:
61
62                int16_t imm;
63
64                /// Constructor
65                TrapImm(const char *mnem, MachInst _machInst, OpClass __opClass) :
66                    MipsStaticInst(mnem, _machInst, __opClass),imm(INTIMM)
67                {
68                }
69
70                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
71
72
73        };
74
75}};
76
77output decoder {{
78        std::string Trap::generateDisassembly(Addr pc, const SymbolTable *symtab) const
79        {
80                return "Disassembly of trap instruction\n";
81        }
82        std::string TrapImm::generateDisassembly(Addr pc, const SymbolTable *symtab) const
83        {
84                return "Disassembly of trap instruction\n";
85        }
86}};
87
88def template TrapExecute {{
89        //Edit This Template When Traps Are Implemented
90        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
91        {
92                //Write the resulting state to the execution context
93                %(op_wb)s;
94
95                //Call into the trap handler with the appropriate fault
96                return No_Fault;
97        }
98}};
99def format Trap(code, *flags) {{
100
101        code ='bool cond;\n' + code
102        code += 'if (cond) {\n'
103        code += 'fault = new TrapFault();\n};'
104
105        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
106        header_output = BasicDeclare.subst(iop)
107        decoder_output = BasicConstructor.subst(iop)
108        decode_block = BasicDecode.subst(iop)
109        exec_output = BasicExecute.subst(iop)
110}};
111def format TrapImm(code, *flags) {{
112
113        code ='bool cond;\n' + code
114        code += 'if (cond) {\n'
115        code += 'fault = new TrapFault();\n};'
116        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
117        header_output = BasicDeclare.subst(iop)
118        decoder_output = BasicConstructor.subst(iop)
119        decode_block = BasicDecode.subst(iop)
120        exec_output = BasicExecute.subst(iop)
121}};
122