fs_translating_port_proxy.cc revision 4070 
1/*
2 * Copyright (c) 2006 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: Ali Saidi
29 */
30
31/**
32 * @file
33 * Port object definitions.
34 */
35
36#include "base/chunk_generator.hh"
37#include "cpu/thread_context.hh"
38#include "mem/vport.hh"
39
40void
41VirtualPort::readBlob(Addr addr, uint8_t *p, int size)
42{
43    Addr paddr;
44    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
45            gen.next())
46    {
47        if (tc)
48            paddr = TheISA::vtophys(tc,gen.addr());
49        else
50            paddr = TheISA::vtophys(gen.addr());
51
52        FunctionalPort::readBlob(paddr, p, gen.size());
53        p += gen.size();
54    }
55}
56
57void
58VirtualPort::writeBlob(Addr addr, uint8_t *p, int size)
59{
60    Addr paddr;
61    for (ChunkGenerator gen(addr, size, TheISA::PageBytes); !gen.done();
62            gen.next())
63    {
64        if (tc)
65            paddr = TheISA::vtophys(tc,gen.addr());
66        else
67            paddr = TheISA::vtophys(gen.addr());
68
69        FunctionalPort::writeBlob(paddr, p, gen.size());
70        p += gen.size();
71    }
72}
73
74void
75CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen)
76{
77    uint8_t *dst = (uint8_t *)dest;
78    VirtualPort *vp = tc->getVirtPort(tc);
79
80    vp->readBlob(src, dst, cplen);
81
82    tc->delVirtPort(vp);
83
84}
85
86void
87CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen)
88{
89    uint8_t *src = (uint8_t *)source;
90    VirtualPort *vp = tc->getVirtPort(tc);
91
92    vp->writeBlob(dest, src, cplen);
93
94    tc->delVirtPort(vp);
95}
96
97void
98CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen)
99{
100    int len = 0;
101    char *start = dst;
102    VirtualPort *vp = tc->getVirtPort(tc);
103
104    do {
105        vp->readBlob(vaddr++, (uint8_t*)dst++, 1);
106    } while (len < maxlen && start[len++] != 0 );
107
108    tc->delVirtPort(vp);
109    dst[len] = 0;
110}
111
112void
113CopyStringIn(ThreadContext *tc, char *src, Addr vaddr)
114{
115    VirtualPort *vp = tc->getVirtPort(tc);
116    for (ChunkGenerator gen(vaddr, strlen(src), TheISA::PageBytes); !gen.done();
117            gen.next())
118    {
119        vp->writeBlob(gen.addr(), (uint8_t*)src, gen.size());
120        src += gen.size();
121    }
122    tc->delVirtPort(vp);
123}
124