faults.cc revision 5245 
1/*
2 * Copyright (c) 2003-2007 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 */
30
31/*
32 * Copyright (c) 2007 The Hewlett-Packard Development Company
33 * All rights reserved.
34 *
35 * Redistribution and use of this software in source and binary forms,
36 * with or without modification, are permitted provided that the
37 * following conditions are met:
38 *
39 * The software must be used only for Non-Commercial Use which means any
40 * use which is NOT directed to receiving any direct monetary
41 * compensation for, or commercial advantage from such use.  Illustrative
42 * examples of non-commercial use are academic research, personal study,
43 * teaching, education and corporate research & development.
44 * Illustrative examples of commercial use are distributing products for
45 * commercial advantage and providing services using the software for
46 * commercial advantage.
47 *
48 * If you wish to use this software or functionality therein that may be
49 * covered by patents for commercial use, please contact:
50 *     Director of Intellectual Property Licensing
51 *     Office of Strategy and Technology
52 *     Hewlett-Packard Company
53 *     1501 Page Mill Road
54 *     Palo Alto, California  94304
55 *
56 * Redistributions of source code must retain the above copyright notice,
57 * this list of conditions and the following disclaimer.  Redistributions
58 * in binary form must reproduce the above copyright notice, this list of
59 * conditions and the following disclaimer in the documentation and/or
60 * other materials provided with the distribution.  Neither the name of
61 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
62 * contributors may be used to endorse or promote products derived from
63 * this software without specific prior written permission.  No right of
64 * sublicense is granted herewith.  Derivatives of the software and
65 * output created using the software may be prepared, but only for
66 * Non-Commercial Uses.  Derivatives of the software may be shared with
67 * others provided: (i) the others agree to abide by the list of
68 * conditions herein which includes the Non-Commercial Use restrictions;
69 * and (ii) such Derivatives of the software include the above copyright
70 * notice to acknowledge the contribution from this software where
71 * applicable, this list of conditions and the disclaimer below.
72 *
73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
74 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
75 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
76 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
77 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
78 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
79 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
80 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
81 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
82 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
83 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
84 *
85 * Authors: Gabe Black
86 */
87
88#include "arch/x86/faults.hh"
89#include "base/trace.hh"
90#include "config/full_system.hh"
91#include "cpu/thread_context.hh"
92#if !FULL_SYSTEM
93#include "arch/x86/isa_traits.hh"
94#include "mem/page_table.hh"
95#include "sim/process.hh"
96#else
97#include "arch/x86/tlb.hh"
98#endif
99
100namespace X86ISA
101{
102#if FULL_SYSTEM
103    void X86Trap::invoke(ThreadContext * tc)
104    {
105        panic("X86 faults are not implemented!");
106    }
107
108    void X86Abort::invoke(ThreadContext * tc)
109    {
110        panic("X86 faults are not implemented!");
111    }
112
113    void X86Interrupt::invoke(ThreadContext * tc)
114    {
115        panic("X86 faults are not implemented!");
116    }
117
118    void FakeITLBFault::invoke(ThreadContext * tc)
119    {
120        // Start the page table walker.
121        tc->getITBPtr()->walk(tc, vaddr);
122    }
123
124    void FakeDTLBFault::invoke(ThreadContext * tc)
125    {
126        // Start the page table walker.
127        tc->getDTBPtr()->walk(tc, vaddr);
128    }
129
130#else // !FULL_SYSTEM
131    void FakeITLBFault::invoke(ThreadContext * tc)
132    {
133        DPRINTF(TLB, "Invoking an ITLB fault for address %#x at pc %#x.\n",
134                vaddr, tc->readPC());
135        Process *p = tc->getProcessPtr();
136        TlbEntry entry;
137        bool success = p->pTable->lookup(vaddr, entry);
138        if(!success) {
139            panic("Tried to execute unmapped address %#x.\n", vaddr);
140        } else {
141            Addr alignedVaddr = p->pTable->pageAlign(vaddr);
142            DPRINTF(TLB, "Mapping %#x to %#x\n", alignedVaddr,
143                    entry.pageStart());
144            tc->getITBPtr()->insert(alignedVaddr, entry);
145        }
146    }
147
148    void FakeDTLBFault::invoke(ThreadContext * tc)
149    {
150        DPRINTF(TLB, "Invoking an DTLB fault for address %#x at pc %#x.\n",
151                vaddr, tc->readPC());
152        Process *p = tc->getProcessPtr();
153        TlbEntry entry;
154        bool success = p->pTable->lookup(vaddr, entry);
155        if(!success) {
156            p->checkAndAllocNextPage(vaddr);
157            success = p->pTable->lookup(vaddr, entry);
158        }
159        if(!success) {
160            panic("Tried to access unmapped address %#x.\n", vaddr);
161        } else {
162            Addr alignedVaddr = p->pTable->pageAlign(vaddr);
163            DPRINTF(TLB, "Mapping %#x to %#x\n", alignedVaddr,
164                    entry.pageStart());
165            tc->getDTBPtr()->insert(alignedVaddr, entry);
166        }
167    }
168#endif
169} // namespace X86ISA
170
171