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
54using namespace TheISA;
55
56SETranslatingPortProxy::SETranslatingPortProxy(Port& port, Process *p,
57 AllocType alloc)
58 : PortProxy(port), pTable(p->pTable), process(p),
59 allocating(alloc)
60{ }
61
62SETranslatingPortProxy::~SETranslatingPortProxy()
63{ }
64
65bool
66SETranslatingPortProxy::tryReadBlob(Addr addr, uint8_t *p, int size)
67{
68 int prevSize = 0;
69
70 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
71 Addr paddr;
72
73 if (!pTable->translate(gen.addr(),paddr))
74 return false;
75
76 PortProxy::readBlob(paddr, p + prevSize, gen.size());
77 prevSize += gen.size();
78 }
79
80 return true;
81}
82
83void
84SETranslatingPortProxy::readBlob(Addr addr, uint8_t *p, int size)
85{
86 if (!tryReadBlob(addr, p, size))
87 fatal("readBlob(0x%x, ...) failed", addr);
88}
89
90
91bool
92SETranslatingPortProxy::tryWriteBlob(Addr addr, uint8_t *p, int size)
93{
94 int prevSize = 0;
95
96 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
97 Addr paddr;
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 for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) {
133 Addr paddr;
134
135 if (!pTable->translate(gen.addr(), paddr)) {
136 if (allocating == Always) {
137 process->allocateMem(roundDown(gen.addr(), VMPageSize),
138 VMPageSize);
139 pTable->translate(gen.addr(), paddr);
140 } else {
141 return false;
142 }
143 }
144
145 PortProxy::memsetBlob(paddr, val, gen.size());
146 }
147
148 return true;
149}
150
151void
152SETranslatingPortProxy::memsetBlob(Addr addr, uint8_t val, int size)
153{
154 if (!tryMemsetBlob(addr, val, size))
155 fatal("memsetBlob(0x%x, ...) failed", addr);
156}
157
158
159bool
160SETranslatingPortProxy::tryWriteString(Addr addr, const char *str)
161{
162 uint8_t c;
163
164 Addr vaddr = addr;
165
166 do {
167 c = *str++;
168 Addr paddr;
169
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 uint8_t c;
190
191 Addr vaddr = addr;
192
193 do {
194 Addr paddr;
195
196 if (!pTable->translate(vaddr++, paddr))
197 return false;
198
199 PortProxy::readBlob(paddr, &c, 1);
200 str += c;
201 } while (c);
202
203 return true;
204}
205
206void
207SETranslatingPortProxy::readString(std::string &str, Addr addr)
208{
209 if (!tryReadString(str, addr))
210 fatal("readString(0x%x, ...) failed", addr);
211}
212