unknown.isa revision 7720:65d338a8dba4 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007-2008 The Florida State University
4// Copyright (c) 2009 The University of Edinburgh
5// All rights reserved.
6//
7// Redistribution and use in source and binary forms, with or without
8// modification, are permitted provided that the following conditions are
9// met: redistributions of source code must retain the above copyright
10// notice, this list of conditions and the following disclaimer;
11// redistributions in binary form must reproduce the above copyright
12// notice, this list of conditions and the following disclaimer in the
13// documentation and/or other materials provided with the distribution;
14// neither the name of the copyright holders nor the names of its
15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29//
30// Authors: Stephen Hines
31//          Timothy M. Jones
32
33////////////////////////////////////////////////////////////////////
34//
35// Unknown instructions
36//
37
38output header {{
39    /**
40     * Static instruction class for unknown (illegal) instructions.
41     * These cause simulator termination if they are executed in a
42     * non-speculative mode.  This is a leaf class.
43     */
44    class Unknown : public PowerStaticInst
45    {
46      public:
47        /// Constructor
48        Unknown(ExtMachInst _machInst)
49            : PowerStaticInst("unknown", _machInst, No_OpClass)
50        {
51            // don't call execute() (which panics) if we're on a
52            // speculative path
53            flags[IsNonSpeculative] = true;
54        }
55
56        %(BasicExecDeclare)s
57
58        std::string
59        generateDisassembly(Addr pc, const SymbolTable *symtab) const;
60    };
61}};
62
63output decoder {{
64    std::string
65    Unknown::generateDisassembly(Addr pc, const SymbolTable *symtab) const
66    {
67        return csprintf("%-10s (inst 0x%x, opcode 0x%x, binary:%s)",
68                        "unknown", machInst, OPCODE, inst2string(machInst));
69    }
70}};
71
72output exec {{
73    Fault
74    Unknown::execute(%(CPU_exec_context)s *xc,
75                     Trace::InstRecord *traceData) const
76    {
77        panic("attempt to execute unknown instruction at %#x"
78              "(inst 0x%08x, opcode 0x%x, binary: %s)",
79              xc->pcState().pc(), machInst, OPCODE, inst2string(machInst));
80        return new UnimplementedOpcodeFault;
81    }
82}};
83
84def format Unknown() {{
85    decode_block = 'return new Unknown(machInst);\n'
86}};
87
88