fs_translating_port_proxy.cc revision 12532:a86ce386add1 
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 "mem/fs_translating_port_proxy.hh"
50
51#include "arch/vtophys.hh"
52#include "base/chunk_generator.hh"
53#include "cpu/base.hh"
54#include "cpu/thread_context.hh"
55#include "sim/system.hh"
56
57using namespace TheISA;
58
59FSTranslatingPortProxy::FSTranslatingPortProxy(ThreadContext *tc)
60    : PortProxy(tc->getCpuPtr()->getDataPort(),
61                tc->getSystemPtr()->cacheLineSize()), _tc(tc)
62{
63}
64
65FSTranslatingPortProxy::FSTranslatingPortProxy(MasterPort &port,
66                                               unsigned int cacheLineSize)
67    : PortProxy(port, cacheLineSize), _tc(NULL)
68{
69}
70
71FSTranslatingPortProxy::~FSTranslatingPortProxy()
72{
73}
74
75void
76FSTranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
77{
78    Addr paddr;
79    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
80         gen.next())
81    {
82        if (_tc)
83            paddr = TheISA::vtophys(_tc,gen.addr());
84        else
85            paddr = TheISA::vtophys(gen.addr());
86
87        PortProxy::readBlobPhys(paddr, 0, p, gen.size());
88        p += gen.size();
89    }
90}
91
92void
93FSTranslatingPortProxy::writeBlob(Addr addr, const uint8_t *p, int size) const
94{
95    Addr paddr;
96    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
97         gen.next())
98    {
99        if (_tc)
100            paddr = TheISA::vtophys(_tc,gen.addr());
101        else
102            paddr = TheISA::vtophys(gen.addr());
103
104        PortProxy::writeBlobPhys(paddr, 0, p, gen.size());
105        p += gen.size();
106    }
107}
108
109void
110FSTranslatingPortProxy::memsetBlob(Addr address, uint8_t v, int size) const
111{
112    Addr paddr;
113    for (ChunkGenerator gen(address, size, TheISA::PageBytes); !gen.done();
114         gen.next())
115    {
116        if (_tc)
117            paddr = TheISA::vtophys(_tc,gen.addr());
118        else
119            paddr = TheISA::vtophys(gen.addr());
120
121        PortProxy::memsetBlobPhys(paddr, 0, v, gen.size());
122    }
123}
124
125void
126CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
127{
128    uint8_t *dst = (uint8_t *)dest;
129    tc->getVirtProxy().readBlob(src, dst, cplen);
130}
131
132void
133CopyIn(ThreadContext *tc, Addr dest, const void *source, size_t cplen)
134{
135    uint8_t *src = (uint8_t *)source;
136    tc->getVirtProxy().writeBlob(dest, src, cplen);
137}
138
139void
140CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
141{
142    char *start = dst;
143    FSTranslatingPortProxy &vp = tc->getVirtProxy();
144
145    bool foundNull = false;
146    while ((dst - start + 1) < maxlen && !foundNull) {
147        vp.readBlob(vaddr++, (uint8_t*)dst, 1);
148        if (*dst == '\0')
149            foundNull = true;
150        dst++;
151    }
152
153    if (!foundNull)
154        *dst = '\0';
155}
156
157void
158CopyStringIn(ThreadContext *tc, const char *src, Addr vaddr)
159{
160    FSTranslatingPortProxy &vp = tc->getVirtProxy();
161    for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
162         gen.next())
163    {
164        vp.writeBlob(gen.addr(), (uint8_t*)src, gen.size());
165        src += gen.size();
166    }
167}
168