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 "config/full_system.hh"
42#include "config/the_isa.hh"
43#include "mem/mem_object.hh"
44#include "mem/physical.hh"
45#include "sim/byteswap.hh"
46#include "sim/system.hh"
47#include "sim/debug.hh"
48
49#if FULL_SYSTEM
50#include "arch/vtophys.hh"
51#include "kern/kernel_stats.hh"
52#else
53#include "params/System.hh"
54#endif
55
56using namespace std;
57using namespace TheISA;
58
59vector<System *> System::systemList;
60
61int System::numSystemsRunning = 0;
62
63System::System(Params *p)
64 : SimObject(p), physmem(p->physmem), _numContexts(0),
65#if FULL_SYSTEM
66 init_param(p->init_param),
67 functionalPort(p->name + "-fport"),
68 virtPort(p->name + "-vport"),
69 loadAddrMask(p->load_addr_mask),
70#else
71 page_ptr(0),
72 next_PID(0),
73#endif
74 memoryMode(p->mem_mode), _params(p)
75{
76 // add self to global system list
77 systemList.push_back(this);
78
79#if FULL_SYSTEM
80 kernelSymtab = new SymbolTable;
81 if (!debugSymbolTable)
82 debugSymbolTable = new SymbolTable;
83
84
85 /**
86 * Get a functional port to memory
87 */
88 Port *mem_port;
89 mem_port = physmem->getPort("functional");
90 functionalPort.setPeer(mem_port);
91 mem_port->setPeer(&functionalPort);
92
93 mem_port = physmem->getPort("functional");
94 virtPort.setPeer(mem_port);
95 mem_port->setPeer(&virtPort);
96
97
98 /**
99 * Load the kernel code into memory
100 */
101 if (params()->kernel == "") {
102 inform("No kernel set for full system simulation. Assuming you know what"
103 " you're doing...\n");
104 } else {
105 // Load kernel code
106 kernel = createObjectFile(params()->kernel);
107 inform("kernel located at: %s", params()->kernel);
108
109 if (kernel == NULL)
110 fatal("Could not load kernel file %s", params()->kernel);
111
112 // Load program sections into memory
113 kernel->loadSections(&functionalPort, loadAddrMask);
114
115 // setup entry points
116 kernelStart = kernel->textBase();
117 kernelEnd = kernel->bssBase() + kernel->bssSize();
118 kernelEntry = kernel->entryPoint();
119
120 // load symbols
121 if (!kernel->loadGlobalSymbols(kernelSymtab))
122 fatal("could not load kernel symbols\n");
123
124 if (!kernel->loadLocalSymbols(kernelSymtab))
125 fatal("could not load kernel local symbols\n");
126
127 if (!kernel->loadGlobalSymbols(debugSymbolTable))
128 fatal("could not load kernel symbols\n");
129
130 if (!kernel->loadLocalSymbols(debugSymbolTable))
131 fatal("could not load kernel local symbols\n");
132
133 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
134 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
135 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
136 DPRINTF(Loader, "Kernel loaded...\n");
137 }
138#endif // FULL_SYSTEM
139
140 // increment the number of running systms
141 numSystemsRunning++;
142}
143
144System::~System()
145{
146#if FULL_SYSTEM
147 delete kernelSymtab;
148 delete kernel;
149#else
150 panic("System::fixFuncEventAddr needs to be rewritten "
151 "to work with syscall emulation");
152#endif // FULL_SYSTEM}
153}
154
155void
156System::setMemoryMode(Enums::MemoryMode mode)
157{
158 assert(getState() == Drained);
159 memoryMode = mode;
160}
161
162bool System::breakpoint()
163{
164 if (remoteGDB.size())
165 return remoteGDB[0]->breakpoint();
166 return false;
167}
168
169/**
170 * Setting rgdb_wait to a positive integer waits for a remote debugger to
171 * connect to that context ID before continuing. This should really
172 be a parameter on the CPU object or something...
173 */
174int rgdb_wait = -1;
175
176int
177System::registerThreadContext(ThreadContext *tc, int assigned)
178{
179 int id;
180 if (assigned == -1) {
181 for (id = 0; id < threadContexts.size(); id++) {
182 if (!threadContexts[id])
183 break;
184 }
185
186 if (threadContexts.size() <= id)
187 threadContexts.resize(id + 1);
188 } else {
189 if (threadContexts.size() <= assigned)
190 threadContexts.resize(assigned + 1);
191 id = assigned;
192 }
193
194 if (threadContexts[id])
195 fatal("Cannot have two CPUs with the same id (%d)\n", id);
196
197 threadContexts[id] = tc;
198 _numContexts++;
199
200 int port = getRemoteGDBPort();
201 if (port) {
202 RemoteGDB *rgdb = new RemoteGDB(this, tc);
203 GDBListener *gdbl = new GDBListener(rgdb, port + id);
204 gdbl->listen();
205
206 if (rgdb_wait != -1 && rgdb_wait == id)
207 gdbl->accept();
208
209 if (remoteGDB.size() <= id) {
210 remoteGDB.resize(id + 1);
211 }
212
213 remoteGDB[id] = rgdb;
214 }
215
216 return id;
217}
218
219int
220System::numRunningContexts()
221{
222 int running = 0;
223 for (int i = 0; i < _numContexts; ++i) {
224 if (threadContexts[i]->status() != ThreadContext::Halted)
225 ++running;
226 }
227 return running;
228}
229
230void
231System::startup()
232{
233#if FULL_SYSTEM
234 int i;
235 for (i = 0; i < threadContexts.size(); i++)
236 TheISA::startupCPU(threadContexts[i], i);
237#endif
238}
239
240void
241System::replaceThreadContext(ThreadContext *tc, int context_id)
242{
243 if (context_id >= threadContexts.size()) {
244 panic("replaceThreadContext: bad id, %d >= %d\n",
245 context_id, threadContexts.size());
246 }
247
248 threadContexts[context_id] = tc;
249 if (context_id < remoteGDB.size())
250 remoteGDB[context_id]->replaceThreadContext(tc);
251}
252
253#if !FULL_SYSTEM
254Addr
255System::new_page()
256{
257 Addr return_addr = page_ptr << LogVMPageSize;
258 ++page_ptr;
259 if (return_addr >= physmem->size())
260 fatal("Out of memory, please increase size of physical memory.");
261 return return_addr;
262}
263
264Addr
265System::memSize()
266{
267 return physmem->size();
268}
269
270Addr
271System::freeMemSize()
272{
273 return physmem->size() - (page_ptr << LogVMPageSize);
274}
275
276#endif
277
278void
279System::serialize(ostream &os)
280{
281#if FULL_SYSTEM
282 kernelSymtab->serialize("kernel_symtab", os);
283#else // !FULL_SYSTEM
284 SERIALIZE_SCALAR(page_ptr);
285#endif
286}
287
288
289void
290System::unserialize(Checkpoint *cp, const string &section)
291{
292#if FULL_SYSTEM
293 kernelSymtab->unserialize("kernel_symtab", cp, section);
294#else // !FULL_SYSTEM
295 UNSERIALIZE_SCALAR(page_ptr);
296#endif
297}
298
299void
300System::printSystems()
301{
302 vector<System *>::iterator i = systemList.begin();
303 vector<System *>::iterator end = systemList.end();
304 for (; i != end; ++i) {
305 System *sys = *i;
306 cerr << "System " << sys->name() << ": " << hex << sys << endl;
307 }
308}
309
310void
311printSystems()
312{
313 System::printSystems();
314}
315
316const char *System::MemoryModeStrings[3] = {"invalid", "atomic",
317 "timing"};
318
319#if !FULL_SYSTEM
320
321System *
322SystemParams::create()
323{
324 return new System(this);
325}
326
327#endif