faults.cc revision 3415 
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: Gabe Black
29 *          Korey Sewell
30 */
31
32#include "arch/mips/faults.hh"
33#include "cpu/thread_context.hh"
34#include "cpu/base.hh"
35#include "base/trace.hh"
36
37#if !FULL_SYSTEM
38#include "sim/process.hh"
39#include "mem/page_table.hh"
40#endif
41
42namespace MipsISA
43{
44
45FaultName MachineCheckFault::_name = "Machine Check";
46FaultVect MachineCheckFault::_vect = 0x0401;
47FaultStat MachineCheckFault::_count;
48
49FaultName AlignmentFault::_name = "Alignment";
50FaultVect AlignmentFault::_vect = 0x0301;
51FaultStat AlignmentFault::_count;
52
53FaultName ResetFault::_name = "reset";
54FaultVect ResetFault::_vect = 0x0001;
55FaultStat ResetFault::_count;
56
57FaultName ArithmeticFault::_name = "arith";
58FaultVect ArithmeticFault::_vect = 0x0501;
59FaultStat ArithmeticFault::_count;
60
61#if !FULL_SYSTEM
62FaultName PageTableFault::_name = "page_table_fault";
63FaultVect PageTableFault::_vect = 0x0000;
64FaultStat PageTableFault::_count;
65#endif
66
67FaultName InterruptFault::_name = "interrupt";
68FaultVect InterruptFault::_vect = 0x0101;
69FaultStat InterruptFault::_count;
70
71FaultName NDtbMissFault::_name = "dtb_miss_single";
72FaultVect NDtbMissFault::_vect = 0x0201;
73FaultStat NDtbMissFault::_count;
74
75FaultName PDtbMissFault::_name = "dtb_miss_double";
76FaultVect PDtbMissFault::_vect = 0x0281;
77FaultStat PDtbMissFault::_count;
78
79FaultName DtbPageFault::_name = "dfault";
80FaultVect DtbPageFault::_vect = 0x0381;
81FaultStat DtbPageFault::_count;
82
83FaultName DtbAcvFault::_name = "dfault";
84FaultVect DtbAcvFault::_vect = 0x0381;
85FaultStat DtbAcvFault::_count;
86
87FaultName ItbMissFault::_name = "itbmiss";
88FaultVect ItbMissFault::_vect = 0x0181;
89FaultStat ItbMissFault::_count;
90
91FaultName ItbPageFault::_name = "itbmiss";
92FaultVect ItbPageFault::_vect = 0x0181;
93FaultStat ItbPageFault::_count;
94
95FaultName ItbAcvFault::_name = "iaccvio";
96FaultVect ItbAcvFault::_vect = 0x0081;
97FaultStat ItbAcvFault::_count;
98
99FaultName UnimplementedOpcodeFault::_name = "opdec";
100FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
101FaultStat UnimplementedOpcodeFault::_count;
102
103FaultName FloatEnableFault::_name = "fen";
104FaultVect FloatEnableFault::_vect = 0x0581;
105FaultStat FloatEnableFault::_count;
106
107FaultName PalFault::_name = "pal";
108FaultVect PalFault::_vect = 0x2001;
109FaultStat PalFault::_count;
110
111FaultName IntegerOverflowFault::_name = "intover";
112FaultVect IntegerOverflowFault::_vect = 0x0501;
113FaultStat IntegerOverflowFault::_count;
114
115void PageTableFault::invoke(ThreadContext *tc)
116{
117    Process *p = tc->getProcessPtr();
118
119    // address is higher than the stack region or in the current stack region
120    if (vaddr > p->stack_base || vaddr > p->stack_min)
121        FaultBase::invoke(tc);
122
123    // We've accessed the next page
124    if (vaddr > p->stack_min - PageBytes) {
125        p->stack_min -= PageBytes;
126        if (p->stack_base - p->stack_min > 8*1024*1024)
127            fatal("Over max stack size for one thread\n");
128        p->pTable->allocate(p->stack_min, PageBytes);
129        warn("Increasing stack size by one page.");
130    } else {
131        FaultBase::invoke(tc);
132    }
133}
134
135} // namespace MipsISA
136
137