1/*
2 * Copyright (c) 2003-2006 The Regents of The University of Michigan
3 * Copyright (c) 2011 Regents of the University of California
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Steve Reinhardt
30 * Lisa Hsu
31 * Nathan Binkert
32 * Ali Saidi
33 * Rick Strong
34 */
35
36#include "arch/isa_traits.hh"
37#include "arch/remote_gdb.hh"
38#include "arch/utility.hh"
39#include "base/loader/object_file.hh"
40#include "base/loader/symtab.hh"
41#include "base/trace.hh"
42#include "cpu/thread_context.hh"
43#include "config/full_system.hh"
44#include "config/the_isa.hh"
45#include "mem/mem_object.hh"
46#include "mem/physical.hh"
47#include "sim/byteswap.hh"
48#include "sim/system.hh"
49#include "sim/debug.hh"
50
51#if FULL_SYSTEM
52#include "arch/vtophys.hh"
53#include "kern/kernel_stats.hh"
54#include "mem/vport.hh"
55#else
56#include "params/System.hh"
57#endif
58
59using namespace std;
60using namespace TheISA;
61
62vector<System *> System::systemList;
63
64int System::numSystemsRunning = 0;
65
66System::System(Params *p)
67 : SimObject(p), physmem(p->physmem), _numContexts(0),
68#if FULL_SYSTEM
69 init_param(p->init_param),
70 loadAddrMask(p->load_addr_mask),
71#else
72 pagePtr(0),
73 nextPID(0),
74#endif
75 memoryMode(p->mem_mode), _params(p),
76 totalNumInsts(0),
77 instEventQueue("system instruction-based event queue")
78{
79 // add self to global system list
80 systemList.push_back(this);
81
82#if FULL_SYSTEM
83 kernelSymtab = new SymbolTable;
84 if (!debugSymbolTable)
85 debugSymbolTable = new SymbolTable;
86
87
88 /**
89 * Get a functional port to memory
90 */
91 Port *mem_port;
92 functionalPort = new FunctionalPort(name() + "-fport");
93 mem_port = physmem->getPort("functional");
94 functionalPort->setPeer(mem_port);
95 mem_port->setPeer(functionalPort);
96
97 virtPort = new VirtualPort(name() + "-fport");
98 mem_port = physmem->getPort("functional");
99 virtPort->setPeer(mem_port);
100 mem_port->setPeer(virtPort);
101
102
103 /**
104 * Load the kernel code into memory
105 */
106 if (params()->kernel == "") {
107 inform("No kernel set for full system simulation. Assuming you know what"
108 " you're doing...\n");
109 } else {
110 // Load kernel code
111 kernel = createObjectFile(params()->kernel);
112 inform("kernel located at: %s", params()->kernel);
113
114 if (kernel == NULL)
115 fatal("Could not load kernel file %s", params()->kernel);
116
117 // Load program sections into memory
118 kernel->loadSections(functionalPort, loadAddrMask);
119
120 // setup entry points
121 kernelStart = kernel->textBase();
122 kernelEnd = kernel->bssBase() + kernel->bssSize();
123 kernelEntry = kernel->entryPoint();
124
125 // load symbols
126 if (!kernel->loadGlobalSymbols(kernelSymtab))
127 fatal("could not load kernel symbols\n");
128
129 if (!kernel->loadLocalSymbols(kernelSymtab))
130 fatal("could not load kernel local symbols\n");
131
132 if (!kernel->loadGlobalSymbols(debugSymbolTable))
133 fatal("could not load kernel symbols\n");
134
135 if (!kernel->loadLocalSymbols(debugSymbolTable))
136 fatal("could not load kernel local symbols\n");
137
138 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
139 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
140 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
141 DPRINTF(Loader, "Kernel loaded...\n");
142 }
143#endif // FULL_SYSTEM
144
145 // increment the number of running systms
146 numSystemsRunning++;
147}
148
149System::~System()
150{
151#if FULL_SYSTEM
152 delete kernelSymtab;
153 delete kernel;
154#else
155 panic("System::fixFuncEventAddr needs to be rewritten "
156 "to work with syscall emulation");
157#endif // FULL_SYSTEM}
158}
159
160void
161System::setMemoryMode(Enums::MemoryMode mode)
162{
163 assert(getState() == Drained);
164 memoryMode = mode;
165}
166
167bool System::breakpoint()
168{
169 if (remoteGDB.size())
170 return remoteGDB[0]->breakpoint();
171 return false;
172}
173
174/**
175 * Setting rgdb_wait to a positive integer waits for a remote debugger to
176 * connect to that context ID before continuing. This should really
177 be a parameter on the CPU object or something...
178 */
179int rgdb_wait = -1;
180
181int
182System::registerThreadContext(ThreadContext *tc, int assigned)
183{
184 int id;
185 if (assigned == -1) {
186 for (id = 0; id < threadContexts.size(); id++) {
187 if (!threadContexts[id])
188 break;
189 }
190
191 if (threadContexts.size() <= id)
192 threadContexts.resize(id + 1);
193 } else {
194 if (threadContexts.size() <= assigned)
195 threadContexts.resize(assigned + 1);
196 id = assigned;
197 }
198
199 if (threadContexts[id])
200 fatal("Cannot have two CPUs with the same id (%d)\n", id);
201
202 threadContexts[id] = tc;
203 _numContexts++;
204
205 int port = getRemoteGDBPort();
206 if (port) {
207 RemoteGDB *rgdb = new RemoteGDB(this, tc);
208 GDBListener *gdbl = new GDBListener(rgdb, port + id);
209 gdbl->listen();
210
211 if (rgdb_wait != -1 && rgdb_wait == id)
212 gdbl->accept();
213
214 if (remoteGDB.size() <= id) {
215 remoteGDB.resize(id + 1);
216 }
217
218 remoteGDB[id] = rgdb;
219 }
220
221 return id;
222}
223
224int
225System::numRunningContexts()
226{
227 int running = 0;
228 for (int i = 0; i < _numContexts; ++i) {
229 if (threadContexts[i]->status() != ThreadContext::Halted)
230 ++running;
231 }
232 return running;
233}
234
235void
236System::initState()
237{
238#if FULL_SYSTEM
239 int i;
240 for (i = 0; i < threadContexts.size(); i++)
241 TheISA::startupCPU(threadContexts[i], i);
242#endif
243}
244
245void
246System::replaceThreadContext(ThreadContext *tc, int context_id)
247{
248 if (context_id >= threadContexts.size()) {
249 panic("replaceThreadContext: bad id, %d >= %d\n",
250 context_id, threadContexts.size());
251 }
252
253 threadContexts[context_id] = tc;
254 if (context_id < remoteGDB.size())
255 remoteGDB[context_id]->replaceThreadContext(tc);
256}
257
258#if !FULL_SYSTEM
259Addr
260System::new_page()
261{
262 Addr return_addr = pagePtr << LogVMPageSize;
263 ++pagePtr;
264 if (return_addr >= physmem->size())
265 fatal("Out of memory, please increase size of physical memory.");
266 return return_addr;
267}
268
269Addr
270System::memSize()
271{
272 return physmem->size();
273}
274
275Addr
276System::freeMemSize()
277{
278 return physmem->size() - (pagePtr << LogVMPageSize);
279}
280
281#endif
282
283void
284System::resume()
285{
286 SimObject::resume();
287 totalNumInsts = 0;
288}
289
290void
291System::serialize(ostream &os)
292{
293#if FULL_SYSTEM
294 kernelSymtab->serialize("kernel_symtab", os);
295#else // !FULL_SYSTEM
296 SERIALIZE_SCALAR(pagePtr);
297 SERIALIZE_SCALAR(nextPID);
298#endif
299}
300
301
302void
303System::unserialize(Checkpoint *cp, const string &section)
304{
305#if FULL_SYSTEM
306 kernelSymtab->unserialize("kernel_symtab", cp, section);
307#else // !FULL_SYSTEM
308 UNSERIALIZE_SCALAR(pagePtr);
309 UNSERIALIZE_SCALAR(nextPID);
310#endif
311}
312
313void
314System::printSystems()
315{
316 vector<System *>::iterator i = systemList.begin();
317 vector<System *>::iterator end = systemList.end();
318 for (; i != end; ++i) {
319 System *sys = *i;
320 cerr << "System " << sys->name() << ": " << hex << sys << endl;
321 }
322}
323
324void
325printSystems()
326{
327 System::printSystems();
328}
329
330const char *System::MemoryModeStrings[3] = {"invalid", "atomic",
331 "timing"};
332
333#if !FULL_SYSTEM
334
335System *
336SystemParams::create()
337{
338 return new System(this);
339}
340
341#endif