se_translating_port_proxy.cc revision 11793:ef606668d247 
1/*
2 * Copyright (c) 2011 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) 2001-2005 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: Ron Dreslinski
41 *          Steve Reinhardt
42 *          Andreas Hansson
43 */
44
45#include "mem/se_translating_port_proxy.hh"
46
47#include <string>
48
49#include "arch/isa_traits.hh"
50#include "base/chunk_generator.hh"
51#include "config/the_isa.hh"
52#include "mem/page_table.hh"
53#include "sim/process.hh"
54#include "sim/system.hh"
55
56using namespace TheISA;
57
58SETranslatingPortProxy::SETranslatingPortProxy(MasterPort& port, Process *p,
59                                           AllocType alloc)
60    : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable),
61      process(p), allocating(alloc)
62{ }
63
64SETranslatingPortProxy::~SETranslatingPortProxy()
65{ }
66
67bool
68SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size) const
69{
70    int prevSize = 0;
71
72    for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
73        Addr paddr;
74
75        if (!pTable->translate(gen.addr(),paddr))
76            return false;
77
78        PortProxy::readBlob(paddr, p + prevSize, gen.size());
79        prevSize += gen.size();
80    }
81
82    return true;
83}
84
85void
86SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
87{
88    if (!tryReadBlob(addr, p, size))
89        fatal("readBlob(0x%x, ...) failed", addr);
90}
91
92
93bool
94SETranslatingPortProxy::tryWriteBlob(Addr addr, const uint8_t *p,
95                                     int size) const
96{
97    int prevSize = 0;
98
99    for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
100        Addr paddr;
101
102        if (!pTable->translate(gen.addr(), paddr)) {
103            if (allocating == Always) {
104                process->allocateMem(roundDown(gen.addr(), PageBytes),
105                                     PageBytes);
106            } else if (allocating == NextPage) {
107                // check if we've accessed the next page on the stack
108                if (!process->fixupStackFault(gen.addr()))
109                    panic("Page table fault when accessing virtual address %#x "
110                            "during functional write\n", gen.addr());
111            } else {
112                return false;
113            }
114            pTable->translate(gen.addr(), paddr);
115        }
116
117        PortProxy::writeBlob(paddr, p + prevSize, gen.size());
118        prevSize += gen.size();
119    }
120
121    return true;
122}
123
124
125void
126SETranslatingPortProxy::writeBlob(Addr addr, const uint8_t *p, int size) const
127{
128    if (!tryWriteBlob(addr, p, size))
129        fatal("writeBlob(0x%x, ...) failed", addr);
130}
131
132bool
133SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const
134{
135    for (ChunkGenerator gen(addr, size, PageBytes); !gen.done(); gen.next()) {
136        Addr paddr;
137
138        if (!pTable->translate(gen.addr(), paddr)) {
139            if (allocating == Always) {
140                process->allocateMem(roundDown(gen.addr(), PageBytes),
141                                     PageBytes);
142                pTable->translate(gen.addr(), paddr);
143            } else {
144                return false;
145            }
146        }
147
148        PortProxy::memsetBlob(paddr, val, gen.size());
149    }
150
151    return true;
152}
153
154void
155SETranslatingPortProxy::memsetBlob(Addr addr, uint8_t val, int size) const
156{
157    if (!tryMemsetBlob(addr, val, size))
158        fatal("memsetBlob(0x%x, ...) failed", addr);
159}
160
161
162bool
163SETranslatingPortProxy::tryWriteString(Addr addr, const char *str) const
164{
165    uint8_t c;
166
167    Addr vaddr = addr;
168
169    do {
170        c = *str++;
171        Addr paddr;
172
173        if (!pTable->translate(vaddr++, paddr))
174            return false;
175
176        PortProxy::writeBlob(paddr, &c, 1);
177    } while (c);
178
179    return true;
180}
181
182void
183SETranslatingPortProxy::writeString(Addr addr, const char *str) const
184{
185    if (!tryWriteString(addr, str))
186        fatal("writeString(0x%x, ...) failed", addr);
187}
188
189bool
190SETranslatingPortProxy::tryReadString(std::string &str, Addr addr) const
191{
192    uint8_t c;
193
194    Addr vaddr = addr;
195
196    while (true) {
197        Addr paddr;
198
199        if (!pTable->translate(vaddr++, paddr))
200            return false;
201
202        PortProxy::readBlob(paddr, &c, 1);
203        if (c == '\0')
204            break;
205
206        str += c;
207    }
208
209    return true;
210}
211
212void
213SETranslatingPortProxy::readString(std::string &str, Addr addr) const
214{
215    if (!tryReadString(str, addr))
216        fatal("readString(0x%x, ...) failed", addr);
217}
218
219