tlb.cc revision 9738 
1/*
2 * Copyright (c) 2001-2005 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 */
30
31#include "cpu/thread_context.hh"
32#include "mem/page_table.hh"
33#include "sim/faults.hh"
34#include "sim/full_system.hh"
35#include "sim/process.hh"
36#include "sim/tlb.hh"
37
38Fault
39GenericTLB::translateAtomic(RequestPtr req, ThreadContext *tc, Mode)
40{
41    if (FullSystem)
42        panic("Generic translation shouldn't be used in full system mode.\n");
43
44    Process * p = tc->getProcessPtr();
45
46    Fault fault = p->pTable->translate(req);
47    if(fault != NoFault)
48        return fault;
49
50    return NoFault;
51}
52
53void
54GenericTLB::translateTiming(RequestPtr req, ThreadContext *tc,
55        Translation *translation, Mode mode)
56{
57    assert(translation);
58    translation->finish(translateAtomic(req, tc, mode), req, tc, mode);
59}
60
61Fault
62GenericTLB::finalizePhysical(RequestPtr req, ThreadContext *tc, Mode mode) const
63{
64    return NoFault;
65}
66
67void
68GenericTLB::demapPage(Addr vaddr, uint64_t asn)
69{
70    warn("Demapping pages in the generic TLB is unnecessary.\n");
71}
72