se_translating_port_proxy.cc revision 8706:b1838faf3bcc 
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 "base/chunk_generator.hh"
48#include "config/the_isa.hh"
49#include "mem/page_table.hh"
50#include "mem/se_translating_port_proxy.hh"
51#include "sim/process.hh"
52
53using namespace TheISA;
54
55SETranslatingPortProxy::SETranslatingPortProxy(Port& port, Process *p,
56                                           AllocType alloc)
57    : PortProxy(port), pTable(p->pTable), process(p),
58      allocating(alloc)
59{ }
60
61SETranslatingPortProxy::~SETranslatingPortProxy()
62{ }
63
64bool
65SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size)
66{
67    Addr paddr;
68    int prevSize = 0;
69
70    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
71
72        if (!pTable->translate(gen.addr(),paddr))
73            return false;
74
75        PortProxy::readBlob(paddr, p + prevSize, gen.size());
76        prevSize += gen.size();
77    }
78
79    return true;
80}
81
82void
83SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size)
84{
85    if (!tryReadBlob(addr, p, size))
86        fatal("readBlob(0x%x, ...) failed", addr);
87}
88
89
90bool
91SETranslatingPortProxy::tryWriteBlob(Addr addr, uint8_t *p, int size)
92{
93
94    Addr paddr;
95    int prevSize = 0;
96
97    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
98
99        if (!pTable->translate(gen.addr(), paddr)) {
100            if (allocating == Always) {
101                process->allocateMem(roundDown(gen.addr(), VMPageSize),
102                                     VMPageSize);
103            } else if (allocating == NextPage) {
104                // check if we've accessed the next page on the stack
105                if (!process->fixupStackFault(gen.addr()))
106                    panic("Page table fault when accessing virtual address %#x "
107                            "during functional write\n", gen.addr());
108            } else {
109                return false;
110            }
111            pTable->translate(gen.addr(), paddr);
112        }
113
114        PortProxy::writeBlob(paddr, p + prevSize, gen.size());
115        prevSize += gen.size();
116    }
117
118    return true;
119}
120
121
122void
123SETranslatingPortProxy::writeBlob(Addr addr, uint8_t *p, int size)
124{
125    if (!tryWriteBlob(addr, p, size))
126        fatal("writeBlob(0x%x, ...) failed", addr);
127}
128
129bool
130SETranslatingPortProxy::tryMemsetBlob(Addr addr, uint8_t val, int size)
131{
132    Addr paddr;
133
134    for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
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)
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)
162{
163    Addr paddr,vaddr;
164    uint8_t c;
165
166    vaddr = addr;
167
168    do {
169        c = *str++;
170        if (!pTable->translate(vaddr++,paddr))
171            return false;
172
173        PortProxy::writeBlob(paddr, &c, 1);
174    } while (c);
175
176    return true;
177}
178
179void
180SETranslatingPortProxy::writeString(Addr addr, const char *str)
181{
182    if (!tryWriteString(addr, str))
183        fatal("writeString(0x%x, ...) failed", addr);
184}
185
186bool
187SETranslatingPortProxy::tryReadString(std::string &str, Addr addr)
188{
189    Addr paddr,vaddr;
190    uint8_t c;
191
192    vaddr = addr;
193
194    do {
195        if (!pTable->translate(vaddr++,paddr))
196            return false;
197
198        PortProxy::readBlob(paddr, &c, 1);
199        str += c;
200    } while (c);
201
202    return true;
203}
204
205void
206SETranslatingPortProxy::readString(std::string &str, Addr addr)
207{
208    if (!tryReadString(str, addr))
209        fatal("readString(0x%x, ...) failed", addr);
210}
211
212