se_translating_port_proxy.cc revision 14009 
1/*
2 * Copyright (c) 2011 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2001-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ron Dreslinski
41 *          Steve Reinhardt
42 *          Andreas Hansson
43 */
44
45#include "mem/se_translating_port_proxy.hh"
46
47#include <string>
48
49#include "arch/isa_traits.hh"
50#include "base/chunk_generator.hh"
51#include "config/the_isa.hh"
52#include "mem/page_table.hh"
53#include "sim/process.hh"
54#include "sim/system.hh"
55
56using namespace TheISA;
57
58SETranslatingPortProxy::SETranslatingPortProxy(MasterPort& port, Process *p,
59                                           AllocType alloc)
60    : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable),
61      process(p), allocating(alloc)
62{ }
63
64bool
65SETranslatingPortProxy::tryReadBlob(Addr addr, void *p, int size) const
66{
67    int prevSize = 0;
68    auto *bytes = static_cast<uint8_t *>(p);
69
70    for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
71        Addr paddr;
72
73        if (!pTable->translate(gen.addr(),paddr))
74            return false;
75
76        PortProxy::readBlobPhys(paddr, 0, bytes + prevSize, gen.size());
77        prevSize += gen.size();
78    }
79
80    return true;
81}
82
83
84bool
85SETranslatingPortProxy::tryWriteBlob(Addr addr, const void *p, int size) const
86{
87    int prevSize = 0;
88    auto *bytes = static_cast<const uint8_t *>(p);
89
90    for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
91        Addr paddr;
92
93        if (!pTable->translate(gen.addr(), paddr)) {
94            if (allocating == Always) {
95                process->allocateMem(roundDown(gen.addr(), PageBytes),
96                                     PageBytes);
97            } else if (allocating == NextPage) {
98                // check if we've accessed the next page on the stack
99                if (!process->fixupStackFault(gen.addr()))
100                    panic("Page table fault when accessing virtual address %#x "
101                            "during functional write\n", gen.addr());
102            } else {
103                return false;
104            }
105            pTable->translate(gen.addr(), paddr);
106        }
107
108        PortProxy::writeBlobPhys(paddr, 0, bytes + prevSize, gen.size());
109        prevSize += gen.size();
110    }
111
112    return true;
113}
114
115
116bool
117SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const
118{
119    for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
120        Addr paddr;
121
122        if (!pTable->translate(gen.addr(), paddr)) {
123            if (allocating == Always) {
124                process->allocateMem(roundDown(gen.addr(), PageBytes),
125                                     PageBytes);
126                pTable->translate(gen.addr(), paddr);
127            } else {
128                return false;
129            }
130        }
131
132        PortProxy::memsetBlobPhys(paddr, 0, val, gen.size());
133    }
134
135    return true;
136}
137