fs_translating_port_proxy.cc revision 9850:87d6b41749e9 
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 "arch/vtophys.hh"
50#include "base/chunk_generator.hh"
51#include "cpu/base.hh"
52#include "cpu/thread_context.hh"
53#include "mem/fs_translating_port_proxy.hh"
54#include "sim/system.hh"
55
56using namespace TheISA;
57
58FSTranslatingPortProxy::FSTranslatingPortProxy(ThreadContext *tc)
59    : PortProxy(tc->getCpuPtr()->getDataPort(),
60                tc->getSystemPtr()->cacheLineSize()), _tc(tc)
61{
62}
63
64FSTranslatingPortProxy::FSTranslatingPortProxy(MasterPort &port,
65                                               unsigned int cacheLineSize)
66    : PortProxy(port, cacheLineSize), _tc(NULL)
67{
68}
69
70FSTranslatingPortProxy::~FSTranslatingPortProxy()
71{
72}
73
74void
75FSTranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
76{
77    Addr paddr;
78    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
79         gen.next())
80    {
81        if (_tc)
82            paddr = TheISA::vtophys(_tc,gen.addr());
83        else
84            paddr = TheISA::vtophys(gen.addr());
85
86        PortProxy::readBlob(paddr, p, gen.size());
87        p += gen.size();
88    }
89}
90
91void
92FSTranslatingPortProxy::writeBlob(Addr addr, uint8_t *p, int size) const
93{
94    Addr paddr;
95    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
96         gen.next())
97    {
98        if (_tc)
99            paddr = TheISA::vtophys(_tc,gen.addr());
100        else
101            paddr = TheISA::vtophys(gen.addr());
102
103        PortProxy::writeBlob(paddr, p, gen.size());
104        p += gen.size();
105    }
106}
107
108void
109FSTranslatingPortProxy::memsetBlob(Addr address, uint8_t v, int size) const
110{
111    Addr paddr;
112    for (ChunkGenerator gen(address, size, TheISA::PageBytes); !gen.done();
113         gen.next())
114    {
115        if (_tc)
116            paddr = TheISA::vtophys(_tc,gen.addr());
117        else
118            paddr = TheISA::vtophys(gen.addr());
119
120        PortProxy::memsetBlob(paddr, v, gen.size());
121    }
122}
123
124void
125CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
126{
127    uint8_t *dst = (uint8_t *)dest;
128    tc->getVirtProxy().readBlob(src, dst, cplen);
129}
130
131void
132CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen)
133{
134    uint8_t *src = (uint8_t *)source;
135    tc->getVirtProxy().writeBlob(dest, src, cplen);
136}
137
138void
139CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
140{
141    char *start = dst;
142    FSTranslatingPortProxy &vp = tc->getVirtProxy();
143
144    bool foundNull = false;
145    while ((dst - start + 1) < maxlen && !foundNull) {
146        vp.readBlob(vaddr++, (uint8_t*)dst, 1);
147        if (*dst == '\0')
148            foundNull = true;
149        dst++;
150    }
151
152    if (!foundNull)
153        *dst = '\0';
154}
155
156void
157CopyStringIn(ThreadContext *tc, char *src, Addr vaddr)
158{
159    FSTranslatingPortProxy &vp = tc->getVirtProxy();
160    for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
161         gen.next())
162    {
163        vp.writeBlob(gen.addr(), (uint8_t*)src, gen.size());
164        src += gen.size();
165    }
166}
167