se_translating_port_proxy.cc revision 9814:7ad2b0186a32 
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 <string>
46
47#include "arch/isa_traits.hh"
48#include "base/chunk_generator.hh"
49#include "config/the_isa.hh"
50#include "mem/page_table.hh"
51#include "mem/se_translating_port_proxy.hh"
52#include "sim/process.hh"
53#include "sim/system.hh"
54
55using namespace TheISA;
56
57SETranslatingPortProxy::SETranslatingPortProxy(MasterPort& port, Process *p,
58                                           AllocType alloc)
59    : PortProxy(port, p->system->cacheLineSize()), pTable(p->pTable),
60      process(p), allocating(alloc)
61{ }
62
63SETranslatingPortProxy::~SETranslatingPortProxy()
64{ }
65
66bool
67SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size) const
68{
69    int prevSize = 0;
70
71    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
72        Addr paddr;
73
74        if (!pTable->translate(gen.addr(),paddr))
75            return false;
76
77        PortProxy::readBlob(paddr, p + prevSize, gen.size());
78        prevSize += gen.size();
79    }
80
81    return true;
82}
83
84void
85SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size) const
86{
87    if (!tryReadBlob(addr, p, size))
88        fatal("readBlob(0x%x, ...) failed", addr);
89}
90
91
92bool
93SETranslatingPortProxy::tryWriteBlob(Addr addr, uint8_t *p, int size) const
94{
95    int prevSize = 0;
96
97    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
98        Addr paddr;
99
100        if (!pTable->translate(gen.addr(), paddr)) {
101            if (allocating == Always) {
102                process->allocateMem(roundDown(gen.addr(), VMPageSize),
103                                     VMPageSize);
104            } else if (allocating == NextPage) {
105                // check if we've accessed the next page on the stack
106                if (!process->fixupStackFault(gen.addr()))
107                    panic("Page table fault when accessing virtual address %#x "
108                            "during functional write\n", gen.addr());
109            } else {
110                return false;
111            }
112            pTable->translate(gen.addr(), paddr);
113        }
114
115        PortProxy::writeBlob(paddr, p + prevSize, gen.size());
116        prevSize += gen.size();
117    }
118
119    return true;
120}
121
122
123void
124SETranslatingPortProxy::writeBlob(Addr addr, uint8_t *p, int size) const
125{
126    if (!tryWriteBlob(addr, p, size))
127        fatal("writeBlob(0x%x, ...) failed", addr);
128}
129
130bool
131SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size) const
132{
133    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
134        Addr paddr;
135
136        if (!pTable->translate(gen.addr(), paddr)) {
137            if (allocating == Always) {
138                process->allocateMem(roundDown(gen.addr(), VMPageSize),
139                                     VMPageSize);
140                pTable->translate(gen.addr(), paddr);
141            } else {
142                return false;
143            }
144        }
145
146        PortProxy::memsetBlob(paddr, val, gen.size());
147    }
148
149    return true;
150}
151
152void
153SETranslatingPortProxy::memsetBlob(Addr addr, uint8_t val, int size) const
154{
155    if (!tryMemsetBlob(addr, val, size))
156        fatal("memsetBlob(0x%x, ...) failed", addr);
157}
158
159
160bool
161SETranslatingPortProxy::tryWriteString(Addr addr, const char *str) const
162{
163    uint8_t c;
164
165    Addr vaddr = addr;
166
167    do {
168        c = *str++;
169        Addr paddr;
170
171        if (!pTable->translate(vaddr++, paddr))
172            return false;
173
174        PortProxy::writeBlob(paddr, &c, 1);
175    } while (c);
176
177    return true;
178}
179
180void
181SETranslatingPortProxy::writeString(Addr addr, const char *str) const
182{
183    if (!tryWriteString(addr, str))
184        fatal("writeString(0x%x, ...) failed", addr);
185}
186
187bool
188SETranslatingPortProxy::tryReadString(std::string &str, Addr addr) const
189{
190    uint8_t c;
191
192    Addr vaddr = addr;
193
194    while (true) {
195        Addr paddr;
196
197        if (!pTable->translate(vaddr++, paddr))
198            return false;
199
200        PortProxy::readBlob(paddr, &c, 1);
201        if (c == '\0')
202            break;
203
204        str += c;
205    }
206
207    return true;
208}
209
210void
211SETranslatingPortProxy::readString(std::string &str, Addr addr) const
212{
213    if (!tryReadString(str, addr))
214        fatal("readString(0x%x, ...) failed", addr);
215}
216
217