1/*
2 * Copyright (c) 2003-2006 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 * Authors: Steve Reinhardt
29 * Lisa Hsu
30 * Nathan Binkert
31 * Ali Saidi
32 */
33
34#include "arch/isa_traits.hh"
35#include "arch/remote_gdb.hh"
36#include "arch/utility.hh"
37#include "base/loader/object_file.hh"
38#include "base/loader/symtab.hh"
39#include "base/trace.hh"
40#include "cpu/thread_context.hh"
41#include "mem/mem_object.hh"
42#include "mem/physical.hh"
43#include "sim/byteswap.hh"
44#include "sim/system.hh"
45#include "sim/debug.hh"
46#if FULL_SYSTEM
47#include "arch/vtophys.hh"
48#include "kern/kernel_stats.hh"
49#else
50#include "params/System.hh"
51#endif
52
53using namespace std;
54using namespace TheISA;
55
56vector<System *> System::systemList;
57
58int System::numSystemsRunning = 0;
59
60System::System(Params *p)
61 : SimObject(p), physmem(p->physmem), _numContexts(0),
62#if FULL_SYSTEM
63 init_param(p->init_param),
64 functionalPort(p->name + "-fport"),
65 virtPort(p->name + "-vport"),
66#else
67 page_ptr(0),
68 next_PID(0),
69#endif
70 memoryMode(p->mem_mode), _params(p)
71{
72 // add self to global system list
73 systemList.push_back(this);
74
75#if FULL_SYSTEM
76 kernelSymtab = new SymbolTable;
77 if (!debugSymbolTable)
78 debugSymbolTable = new SymbolTable;
79
80
81 /**
82 * Get a functional port to memory
83 */
84 Port *mem_port;
85 mem_port = physmem->getPort("functional");
86 functionalPort.setPeer(mem_port);
87 mem_port->setPeer(&functionalPort);
88
89 mem_port = physmem->getPort("functional");
90 virtPort.setPeer(mem_port);
91 mem_port->setPeer(&virtPort);
92
93
94 /**
95 * Load the kernel code into memory
96 */
97 if (params()->kernel == "") {
98 warn("No kernel set for full system simulation. Assuming you know what"
99 " you're doing...\n");
100 } else {
101 // Load kernel code
102 kernel = createObjectFile(params()->kernel);
103 warn("kernel located at: %s", params()->kernel);
104
105 if (kernel == NULL)
106 fatal("Could not load kernel file %s", params()->kernel);
107
108 // Load program sections into memory
109 kernel->loadSections(&functionalPort, LoadAddrMask);
110
111 // setup entry points
112 kernelStart = kernel->textBase();
113 kernelEnd = kernel->bssBase() + kernel->bssSize();
114 kernelEntry = kernel->entryPoint();
115
116 // load symbols
117 if (!kernel->loadGlobalSymbols(kernelSymtab))
118 panic("could not load kernel symbols\n");
119
120 if (!kernel->loadLocalSymbols(kernelSymtab))
121 panic("could not load kernel local symbols\n");
122
123 if (!kernel->loadGlobalSymbols(debugSymbolTable))
124 panic("could not load kernel symbols\n");
125
126 if (!kernel->loadLocalSymbols(debugSymbolTable))
127 panic("could not load kernel local symbols\n");
128
129 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
130 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
131 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
132 DPRINTF(Loader, "Kernel loaded...\n");
133 }
134#endif // FULL_SYSTEM
135
136 // increment the number of running systms
137 numSystemsRunning++;
138}
139
140System::~System()
141{
142#if FULL_SYSTEM
143 delete kernelSymtab;
144 delete kernel;
145#else
146 panic("System::fixFuncEventAddr needs to be rewritten "
147 "to work with syscall emulation");
148#endif // FULL_SYSTEM}
149}
150
151int rgdb_wait = -1;
152int rgdb_enable = true;
153
154void
155System::setMemoryMode(Enums::MemoryMode mode)
156{
157 assert(getState() == Drained);
158 memoryMode = mode;
159}
160
161bool System::breakpoint()
162{
163 if (remoteGDB.size())
164 return remoteGDB[0]->breakpoint();
165 return false;
166}
167
168int
169System::registerThreadContext(ThreadContext *tc)
170{
171 int id;
172 for (id = 0; id < threadContexts.size(); id++) {
173 if (!threadContexts[id])
174 break;
175 }
176
177 if (threadContexts.size() <= id)
178 threadContexts.resize(id + 1);
179
180 if (threadContexts[id])
181 panic("Cannot have two CPUs with the same id (%d)\n", id);
182
183 threadContexts[id] = tc;
184 _numContexts++;
185
186 int port = getRemoteGDBPort();
187 if (rgdb_enable && port) {
188 RemoteGDB *rgdb = new RemoteGDB(this, tc);
189 GDBListener *gdbl = new GDBListener(rgdb, port + id);
190 gdbl->listen();
191 /**
192 * Uncommenting this line waits for a remote debugger to
193 * connect to the simulator before continuing.
194 */
195 if (rgdb_wait != -1 && rgdb_wait == id)
196 gdbl->accept();
197
198 if (remoteGDB.size() <= id) {
199 remoteGDB.resize(id + 1);
200 }
201
202 remoteGDB[id] = rgdb;
203 }
204
205 return id;
206}
207
208void
209System::startup()
210{
211#if FULL_SYSTEM
212 int i;
213 for (i = 0; i < threadContexts.size(); i++)
214 TheISA::startupCPU(threadContexts[i], i);
215#endif
216}
217
218void
219System::replaceThreadContext(ThreadContext *tc, int context_id)
220{
221 if (context_id >= threadContexts.size()) {
222 panic("replaceThreadContext: bad id, %d >= %d\n",
223 context_id, threadContexts.size());
224 }
225
226 threadContexts[context_id] = tc;
227 if (context_id < remoteGDB.size())
228 remoteGDB[context_id]->replaceThreadContext(tc);
229}
230
231#if !FULL_SYSTEM
232Addr
233System::new_page()
234{
235 Addr return_addr = page_ptr << LogVMPageSize;
236 ++page_ptr;
237 if (return_addr >= physmem->size())
238 fatal("Out of memory, please increase size of physical memory.");
239 return return_addr;
240}
241#endif
242
243void
244System::serialize(ostream &os)
245{
246#if FULL_SYSTEM
247 kernelSymtab->serialize("kernel_symtab", os);
248#else // !FULL_SYSTEM
249 SERIALIZE_SCALAR(page_ptr);
250#endif
251}
252
253
254void
255System::unserialize(Checkpoint *cp, const string &section)
256{
257#if FULL_SYSTEM
258 kernelSymtab->unserialize("kernel_symtab", cp, section);
259#else // !FULL_SYSTEM
260 UNSERIALIZE_SCALAR(page_ptr);
261#endif
262}
263
264void
265System::printSystems()
266{
267 vector<System *>::iterator i = systemList.begin();
268 vector<System *>::iterator end = systemList.end();
269 for (; i != end; ++i) {
270 System *sys = *i;
271 cerr << "System " << sys->name() << ": " << hex << sys << endl;
272 }
273}
274
275void
276printSystems()
277{
278 System::printSystems();
279}
280
281const char *System::MemoryModeStrings[3] = {"invalid", "atomic",
282 "timing"};
283
284#if !FULL_SYSTEM
285
286System *
287SystemParams::create()
288{
289 return new System(this);
290}
291
292#endif