fs_translating_port_proxy.cc revision 9814:7ad2b0186a32 
1/*
2 * Copyright (c) 2011,2013 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) 2006 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: Ali Saidi
41 *          Andreas Hansson
42 */
43
44/**
45 * @file
46 * Port object definitions.
47 */
48
49#include "base/chunk_generator.hh"
50#include "cpu/base.hh"
51#include "cpu/thread_context.hh"
52#include "mem/fs_translating_port_proxy.hh"
53#include "sim/system.hh"
54
55using namespace TheISA;
56
57FSTranslatingPortProxy::FSTranslatingPortProxy(ThreadContext *tc)
58    : PortProxy(tc->getCpuPtr()->getDataPort(),
59                tc->getSystemPtr()->cacheLineSize()), _tc(tc)
60{
61}
62
63FSTranslatingPortProxy::FSTranslatingPortProxy(MasterPort &port,
64                                               unsigned int cacheLineSize)
65    : PortProxy(port, cacheLineSize), _tc(NULL)
66{
67}
68
69FSTranslatingPortProxy::~FSTranslatingPortProxy()
70{
71}
72
73void
74FSTranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
75{
76    Addr paddr;
77    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
78         gen.next())
79    {
80        if (_tc)
81            paddr = TheISA::vtophys(_tc,gen.addr());
82        else
83            paddr = TheISA::vtophys(gen.addr());
84
85        PortProxy::readBlob(paddr, p, gen.size());
86        p += gen.size();
87    }
88}
89
90void
91FSTranslatingPortProxy::writeBlob(Addr addr, uint8_t *p, int size) const
92{
93    Addr paddr;
94    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
95         gen.next())
96    {
97        if (_tc)
98            paddr = TheISA::vtophys(_tc,gen.addr());
99        else
100            paddr = TheISA::vtophys(gen.addr());
101
102        PortProxy::writeBlob(paddr, p, gen.size());
103        p += gen.size();
104    }
105}
106
107void
108FSTranslatingPortProxy::memsetBlob(Addr address, uint8_t v, int size) const
109{
110    Addr paddr;
111    for (ChunkGenerator gen(address, size, TheISA::PageBytes); !gen.done();
112         gen.next())
113    {
114        if (_tc)
115            paddr = TheISA::vtophys(_tc,gen.addr());
116        else
117            paddr = TheISA::vtophys(gen.addr());
118
119        PortProxy::memsetBlob(paddr, v, gen.size());
120    }
121}
122
123void
124CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
125{
126    uint8_t *dst = (uint8_t *)dest;
127    tc->getVirtProxy().readBlob(src, dst, cplen);
128}
129
130void
131CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen)
132{
133    uint8_t *src = (uint8_t *)source;
134    tc->getVirtProxy().writeBlob(dest, src, cplen);
135}
136
137void
138CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
139{
140    char *start = dst;
141    FSTranslatingPortProxy &vp = tc->getVirtProxy();
142
143    bool foundNull = false;
144    while ((dst - start + 1) < maxlen && !foundNull) {
145        vp.readBlob(vaddr++, (uint8_t*)dst, 1);
146        if (*dst == '\0')
147            foundNull = true;
148        dst++;
149    }
150
151    if (!foundNull)
152        *dst = '\0';
153}
154
155void
156CopyStringIn(ThreadContext *tc, char *src, Addr vaddr)
157{
158    FSTranslatingPortProxy &vp = tc->getVirtProxy();
159    for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
160         gen.next())
161    {
162        vp.writeBlob(gen.addr(), (uint8_t*)src, gen.size());
163        src += gen.size();
164    }
165}
166