faults.cc revision 2665:a124942bacb8 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Korey Sewell
29 */
30
31#include "arch/mips/faults.hh"
32#include "cpu/exec_context.hh"
33#include "cpu/base.hh"
34#include "base/trace.hh"
35
36namespace MipsISA
37{
38
39FaultName MachineCheckFault::_name = "Machine Check";
40FaultVect MachineCheckFault::_vect = 0x0401;
41FaultStat MachineCheckFault::_count;
42
43FaultName AlignmentFault::_name = "Alignment";
44FaultVect AlignmentFault::_vect = 0x0301;
45FaultStat AlignmentFault::_count;
46
47FaultName ResetFault::_name = "reset";
48FaultVect ResetFault::_vect = 0x0001;
49FaultStat ResetFault::_count;
50
51FaultName ArithmeticFault::_name = "arith";
52FaultVect ArithmeticFault::_vect = 0x0501;
53FaultStat ArithmeticFault::_count;
54
55FaultName InterruptFault::_name = "interrupt";
56FaultVect InterruptFault::_vect = 0x0101;
57FaultStat InterruptFault::_count;
58
59FaultName NDtbMissFault::_name = "dtb_miss_single";
60FaultVect NDtbMissFault::_vect = 0x0201;
61FaultStat NDtbMissFault::_count;
62
63FaultName PDtbMissFault::_name = "dtb_miss_double";
64FaultVect PDtbMissFault::_vect = 0x0281;
65FaultStat PDtbMissFault::_count;
66
67FaultName DtbPageFault::_name = "dfault";
68FaultVect DtbPageFault::_vect = 0x0381;
69FaultStat DtbPageFault::_count;
70
71FaultName DtbAcvFault::_name = "dfault";
72FaultVect DtbAcvFault::_vect = 0x0381;
73FaultStat DtbAcvFault::_count;
74
75FaultName ItbMissFault::_name = "itbmiss";
76FaultVect ItbMissFault::_vect = 0x0181;
77FaultStat ItbMissFault::_count;
78
79FaultName ItbPageFault::_name = "itbmiss";
80FaultVect ItbPageFault::_vect = 0x0181;
81FaultStat ItbPageFault::_count;
82
83FaultName ItbAcvFault::_name = "iaccvio";
84FaultVect ItbAcvFault::_vect = 0x0081;
85FaultStat ItbAcvFault::_count;
86
87FaultName UnimplementedOpcodeFault::_name = "opdec";
88FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
89FaultStat UnimplementedOpcodeFault::_count;
90
91FaultName FloatEnableFault::_name = "fen";
92FaultVect FloatEnableFault::_vect = 0x0581;
93FaultStat FloatEnableFault::_count;
94
95FaultName PalFault::_name = "pal";
96FaultVect PalFault::_vect = 0x2001;
97FaultStat PalFault::_count;
98
99FaultName IntegerOverflowFault::_name = "intover";
100FaultVect IntegerOverflowFault::_vect = 0x0501;
101FaultStat IntegerOverflowFault::_count;
102
103#if FULL_SYSTEM
104
105void MipsFault::invoke(ExecContext * xc)
106{
107    FaultBase::invoke(xc);
108    countStat()++;
109
110    // exception restart address
111    if (setRestartAddress() || !xc->inPalMode())
112        xc->setMiscReg(MipsISA::IPR_EXC_ADDR, xc->readPC());
113
114    if (skipFaultingInstruction()) {
115        // traps...  skip faulting instruction.
116        xc->setMiscReg(MipsISA::IPR_EXC_ADDR,
117                   xc->readMiscReg(MipsISA::IPR_EXC_ADDR) + 4);
118    }
119
120    xc->setPC(xc->readMiscReg(MipsISA::IPR_PAL_BASE) + vect());
121    xc->setNextPC(xc->readPC() + sizeof(MachInst));
122}
123
124void ArithmeticFault::invoke(ExecContext * xc)
125{
126    FaultBase::invoke(xc);
127    panic("Arithmetic traps are unimplemented!");
128}
129
130#endif
131
132} // namespace MipsISA
133
134