se_translating_port_proxy.cc revision 2519 
1/*
2 * Copyright (c) 2001-2005 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
29#include <string>
30#include "base/chunk_generator.hh"
31#include "mem/port.hh"
32#include "mem/translating_port.hh"
33#include "mem/page_table.hh"
34
35using namespace TheISA;
36
37TranslatingPort::TranslatingPort(PageTable *p_table, bool alloc)
38    : pTable(p_table), allocating(alloc)
39{ }
40
41TranslatingPort::~TranslatingPort()
42{ }
43
44bool
45TranslatingPort::tryReadBlob(Addr addr, uint8_t *p, int size)
46{
47    Addr paddr;
48    int prevSize = 0;
49
50    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
51
52        if (!pTable->translate(gen.addr(),paddr))
53            return false;
54
55        Port::readBlob(paddr, p + prevSize, gen.size());
56        prevSize += gen.size();
57    }
58
59    return true;
60}
61
62void
63TranslatingPort::readBlob(Addr addr, uint8_t *p, int size)
64{
65    if (!tryReadBlob(addr, p, size))
66        fatal("readBlob(0x%x, ...) failed", addr);
67}
68
69
70bool
71TranslatingPort::tryWriteBlob(Addr addr, uint8_t *p, int size)
72{
73
74    Addr paddr;
75    int prevSize = 0;
76
77    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
78
79        if (!pTable->translate(gen.addr(), paddr)) {
80            if (allocating) {
81                pTable->allocate(roundDown(gen.addr(), VMPageSize),
82                                 VMPageSize);
83                pTable->translate(gen.addr(), paddr);
84            } else {
85                return false;
86            }
87        }
88
89        Port::writeBlob(paddr, p + prevSize, gen.size());
90        prevSize += gen.size();
91    }
92
93    return true;
94}
95
96
97void
98TranslatingPort::writeBlob(Addr addr, uint8_t *p, int size)
99{
100    if (!tryWriteBlob(addr, p, size))
101        fatal("writeBlob(0x%x, ...) failed", addr);
102}
103
104bool
105TranslatingPort::tryMemsetBlob(Addr addr, uint8_t val, int size)
106{
107    Addr paddr;
108
109    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
110
111        if (!pTable->translate(gen.addr(), paddr)) {
112            if (allocating) {
113                pTable->allocate(roundDown(gen.addr(), VMPageSize),
114                                 VMPageSize);
115                pTable->translate(gen.addr(), paddr);
116            } else {
117                return false;
118            }
119        }
120
121        Port::memsetBlob(paddr, val, gen.size());
122    }
123
124    return true;
125}
126
127void
128TranslatingPort::memsetBlob(Addr addr, uint8_t val, int size)
129{
130    if (!tryMemsetBlob(addr, val, size))
131        fatal("memsetBlob(0x%x, ...) failed", addr);
132}
133
134
135bool
136TranslatingPort::tryWriteString(Addr addr, const char *str)
137{
138    Addr paddr,vaddr;
139    uint8_t c;
140
141    vaddr = addr;
142
143    do {
144        c = *str++;
145        if (!pTable->translate(vaddr++,paddr))
146            return false;
147
148        Port::writeBlob(paddr, &c, 1);
149    } while (c);
150
151    return true;
152}
153
154void
155TranslatingPort::writeString(Addr addr, const char *str)
156{
157    if (!tryWriteString(addr, str))
158        fatal("writeString(0x%x, ...) failed", addr);
159}
160
161bool
162TranslatingPort::tryReadString(std::string &str, Addr addr)
163{
164    Addr paddr,vaddr;
165    uint8_t c;
166
167    vaddr = addr;
168
169    do {
170        if (!pTable->translate(vaddr++,paddr))
171            return false;
172
173        Port::readBlob(paddr, &c, 1);
174        str += c;
175    } while (c);
176
177    return true;
178}
179
180void
181TranslatingPort::readString(std::string &str, Addr addr)
182{
183    if (!tryReadString(str, addr))
184        fatal("readString(0x%x, ...) failed", addr);
185}
186
187