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#include "mem/vport.hh"
53#else
54#include "params/System.hh"
55#endif
56
57using namespace std;
58using namespace TheISA;
59
60vector<System *> System::systemList;
61
62int System::numSystemsRunning = 0;
63
64System::System(Params *p)
65 : SimObject(p), physmem(p->physmem), _numContexts(0),
66#if FULL_SYSTEM
67 init_param(p->init_param),
68 loadAddrMask(p->load_addr_mask),
69#else
70 pagePtr(0),
71 nextPID(0),
72#endif
73 memoryMode(p->mem_mode), _params(p)
74{
75 // add self to global system list
76 systemList.push_back(this);
77
78#if FULL_SYSTEM
79 kernelSymtab = new SymbolTable;
80 if (!debugSymbolTable)
81 debugSymbolTable = new SymbolTable;
82
83
84 /**
85 * Get a functional port to memory
86 */
87 Port *mem_port;
88 functionalPort = new FunctionalPort(name() + "-fport");
89 mem_port = physmem->getPort("functional");
90 functionalPort->setPeer(mem_port);
91 mem_port->setPeer(functionalPort);
92
93 virtPort = new VirtualPort(name() + "-fport");
94 mem_port = physmem->getPort("functional");
95 virtPort->setPeer(mem_port);
96 mem_port->setPeer(virtPort);
97
98
99 /**
100 * Load the kernel code into memory
101 */
102 if (params()->kernel == "") {
103 inform("No kernel set for full system simulation. Assuming you know what"
104 " you're doing...\n");
105 } else {
106 // Load kernel code
107 kernel = createObjectFile(params()->kernel);
108 inform("kernel located at: %s", params()->kernel);
109
110 if (kernel == NULL)
111 fatal("Could not load kernel file %s", params()->kernel);
112
113 // Load program sections into memory
114 kernel->loadSections(functionalPort, loadAddrMask);
115
116 // setup entry points
117 kernelStart = kernel->textBase();
118 kernelEnd = kernel->bssBase() + kernel->bssSize();
119 kernelEntry = kernel->entryPoint();
120
121 // load symbols
122 if (!kernel->loadGlobalSymbols(kernelSymtab))
123 fatal("could not load kernel symbols\n");
124
125 if (!kernel->loadLocalSymbols(kernelSymtab))
126 fatal("could not load kernel local symbols\n");
127
128 if (!kernel->loadGlobalSymbols(debugSymbolTable))
129 fatal("could not load kernel symbols\n");
130
131 if (!kernel->loadLocalSymbols(debugSymbolTable))
132 fatal("could not load kernel local symbols\n");
133
134 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
135 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
136 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
137 DPRINTF(Loader, "Kernel loaded...\n");
138 }
139#endif // FULL_SYSTEM
140
141 // increment the number of running systms
142 numSystemsRunning++;
143}
144
145System::~System()
146{
147#if FULL_SYSTEM
148 delete kernelSymtab;
149 delete kernel;
150#else
151 panic("System::fixFuncEventAddr needs to be rewritten "
152 "to work with syscall emulation");
153#endif // FULL_SYSTEM}
154}
155
156void
157System::setMemoryMode(Enums::MemoryMode mode)
158{
159 assert(getState() == Drained);
160 memoryMode = mode;
161}
162
163bool System::breakpoint()
164{
165 if (remoteGDB.size())
166 return remoteGDB[0]->breakpoint();
167 return false;
168}
169
170/**
171 * Setting rgdb_wait to a positive integer waits for a remote debugger to
172 * connect to that context ID before continuing. This should really
173 be a parameter on the CPU object or something...
174 */
175int rgdb_wait = -1;
176
177int
178System::registerThreadContext(ThreadContext *tc, int assigned)
179{
180 int id;
181 if (assigned == -1) {
182 for (id = 0; id < threadContexts.size(); id++) {
183 if (!threadContexts[id])
184 break;
185 }
186
187 if (threadContexts.size() <= id)
188 threadContexts.resize(id + 1);
189 } else {
190 if (threadContexts.size() <= assigned)
191 threadContexts.resize(assigned + 1);
192 id = assigned;
193 }
194
195 if (threadContexts[id])
196 fatal("Cannot have two CPUs with the same id (%d)\n", id);
197
198 threadContexts[id] = tc;
199 _numContexts++;
200
201 int port = getRemoteGDBPort();
202 if (port) {
203 RemoteGDB *rgdb = new RemoteGDB(this, tc);
204 GDBListener *gdbl = new GDBListener(rgdb, port + id);
205 gdbl->listen();
206
207 if (rgdb_wait != -1 && rgdb_wait == id)
208 gdbl->accept();
209
210 if (remoteGDB.size() <= id) {
211 remoteGDB.resize(id + 1);
212 }
213
214 remoteGDB[id] = rgdb;
215 }
216
217 return id;
218}
219
220int
221System::numRunningContexts()
222{
223 int running = 0;
224 for (int i = 0; i < _numContexts; ++i) {
225 if (threadContexts[i]->status() != ThreadContext::Halted)
226 ++running;
227 }
228 return running;
229}
230
231void
232System::initState()
233{
234#if FULL_SYSTEM
235 int i;
236 for (i = 0; i < threadContexts.size(); i++)
237 TheISA::startupCPU(threadContexts[i], i);
238#endif
239}
240
241void
242System::replaceThreadContext(ThreadContext *tc, int context_id)
243{
244 if (context_id >= threadContexts.size()) {
245 panic("replaceThreadContext: bad id, %d >= %d\n",
246 context_id, threadContexts.size());
247 }
248
249 threadContexts[context_id] = tc;
250 if (context_id < remoteGDB.size())
251 remoteGDB[context_id]->replaceThreadContext(tc);
252}
253
254#if !FULL_SYSTEM
255Addr
256System::new_page()
257{
258 Addr return_addr = pagePtr << LogVMPageSize;
259 ++pagePtr;
260 if (return_addr >= physmem->size())
261 fatal("Out of memory, please increase size of physical memory.");
262 return return_addr;
263}
264
265Addr
266System::memSize()
267{
268 return physmem->size();
269}
270
271Addr
272System::freeMemSize()
273{
274 return physmem->size() - (pagePtr << LogVMPageSize);
275}
276
277#endif
278
279void
280System::serialize(ostream &os)
281{
282#if FULL_SYSTEM
283 kernelSymtab->serialize("kernel_symtab", os);
284#else // !FULL_SYSTEM
285 SERIALIZE_SCALAR(pagePtr);
286 SERIALIZE_SCALAR(nextPID);
287#endif
288}
289
290
291void
292System::unserialize(Checkpoint *cp, const string &section)
293{
294#if FULL_SYSTEM
295 kernelSymtab->unserialize("kernel_symtab", cp, section);
296#else // !FULL_SYSTEM
297 UNSERIALIZE_SCALAR(pagePtr);
298 UNSERIALIZE_SCALAR(nextPID);
299#endif
300}
301
302void
303System::printSystems()
304{
305 vector<System *>::iterator i = systemList.begin();
306 vector<System *>::iterator end = systemList.end();
307 for (; i != end; ++i) {
308 System *sys = *i;
309 cerr << "System " << sys->name() << ": " << hex << sys << endl;
310 }
311}
312
313void
314printSystems()
315{
316 System::printSystems();
317}
318
319const char *System::MemoryModeStrings[3] = {"invalid", "atomic",
320 "timing"};
321
322#if !FULL_SYSTEM
323
324System *
325SystemParams::create()
326{
327 return new System(this);
328}
329
330#endif