trap.isa revision 5268:5bfc53fe60e7 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 MIPS Technologies, Inc.
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
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9// notice, this list of conditions and the following disclaimer;
10// redistributions in binary form must reproduce the above copyright
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14// contributors may be used to endorse or promote products derived from
15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28//
29// Authors: Korey Sewell
30//          Jaidev Patwardhan
31
32////////////////////////////////////////////////////////////////////
33//
34// Trap instructions
35//
36
37output header {{
38        /**
39         * Base class for integer operations.
40         */
41        class Trap : public MipsStaticInst
42        {
43                protected:
44
45                /// Constructor
46                Trap(const char *mnem, MachInst _machInst, OpClass __opClass) : MipsStaticInst(mnem, _machInst, __opClass)
47                {
48                }
49
50                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
51        };
52        class TrapImm : public MipsStaticInst
53        {
54                protected:
55
56                int16_t imm;
57
58                /// Constructor
59                TrapImm(const char *mnem, MachInst _machInst, OpClass __opClass) :
60                    MipsStaticInst(mnem, _machInst, __opClass),imm(INTIMM)
61                {
62                }
63
64                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
65
66
67        };
68
69}};
70
71output decoder {{
72        std::string Trap::generateDisassembly(Addr pc, const SymbolTable *symtab) const
73        {
74                return "Disassembly of trap instruction\n";
75        }
76        std::string TrapImm::generateDisassembly(Addr pc, const SymbolTable *symtab) const
77        {
78                return "Disassembly of trap instruction\n";
79        }
80}};
81
82def template TrapExecute {{
83        //Edit This Template When Traps Are Implemented
84        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
85        {
86                //Write the resulting state to the execution context
87                %(op_wb)s;
88
89                //Call into the trap handler with the appropriate fault
90                return No_Fault;
91        }
92}};
93def format Trap(code, *flags) {{
94
95        code ='bool cond;\n' + code
96        code += 'if (cond) {\n'
97        code += 'fault = new TrapFault();\n};'
98
99        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
100        header_output = BasicDeclare.subst(iop)
101        decoder_output = BasicConstructor.subst(iop)
102        decode_block = BasicDecode.subst(iop)
103        exec_output = BasicExecute.subst(iop)
104}};
105def format TrapImm(code, *flags) {{
106
107        code ='bool cond;\n' + code
108        code += 'if (cond) {\n'
109        code += 'fault = new TrapFault();\n};'
110        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
111        header_output = BasicDeclare.subst(iop)
112        decoder_output = BasicConstructor.subst(iop)
113        decode_block = BasicDecode.subst(iop)
114        exec_output = BasicExecute.subst(iop)
115}};
116