system.cc revision 2689 
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 "base/loader/object_file.hh"
36#include "base/loader/symtab.hh"
37#include "base/trace.hh"
38#include "cpu/thread_context.hh"
39#include "mem/mem_object.hh"
40#include "mem/physical.hh"
41#include "sim/builder.hh"
42#include "sim/byteswap.hh"
43#include "sim/system.hh"
44#if FULL_SYSTEM
45#include "arch/vtophys.hh"
46#include "base/remote_gdb.hh"
47#include "kern/kernel_stats.hh"
48#endif
49
50using namespace std;
51using namespace TheISA;
52
53vector<System *> System::systemList;
54
55int System::numSystemsRunning = 0;
56
57System::System(Params *p)
58    : SimObject(p->name), physmem(p->physmem), numcpus(0),
59#if FULL_SYSTEM
60      init_param(p->init_param),
61      functionalPort(p->name + "-fport"),
62      virtPort(p->name + "-vport"),
63#else
64      page_ptr(0),
65#endif
66      _params(p)
67{
68    // add self to global system list
69    systemList.push_back(this);
70
71#if FULL_SYSTEM
72    kernelSymtab = new SymbolTable;
73    debugSymbolTable = new SymbolTable;
74
75
76    /**
77     * Get a functional port to memory
78     */
79    Port *mem_port;
80    mem_port = physmem->getPort("functional");
81    functionalPort.setPeer(mem_port);
82    mem_port->setPeer(&functionalPort);
83
84    mem_port = physmem->getPort("functional");
85    virtPort.setPeer(mem_port);
86    mem_port->setPeer(&virtPort);
87
88
89    /**
90     * Load the kernel code into memory
91     */
92    // Load kernel code
93    kernel = createObjectFile(params()->kernel_path);
94    if (kernel == NULL)
95        fatal("Could not load kernel file %s", params()->kernel_path);
96
97    // Load program sections into memory
98    kernel->loadSections(&functionalPort, LoadAddrMask);
99
100    // setup entry points
101    kernelStart = kernel->textBase();
102    kernelEnd = kernel->bssBase() + kernel->bssSize();
103    kernelEntry = kernel->entryPoint();
104
105    // load symbols
106    if (!kernel->loadGlobalSymbols(kernelSymtab))
107        panic("could not load kernel symbols\n");
108
109    if (!kernel->loadLocalSymbols(kernelSymtab))
110        panic("could not load kernel local symbols\n");
111
112    if (!kernel->loadGlobalSymbols(debugSymbolTable))
113        panic("could not load kernel symbols\n");
114
115    if (!kernel->loadLocalSymbols(debugSymbolTable))
116        panic("could not load kernel local symbols\n");
117
118    DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
119    DPRINTF(Loader, "Kernel end   = %#x\n", kernelEnd);
120    DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
121    DPRINTF(Loader, "Kernel loaded...\n");
122
123    kernelBinning = new Kernel::Binning(this);
124#endif // FULL_SYSTEM
125
126    // increment the number of running systms
127    numSystemsRunning++;
128}
129
130System::~System()
131{
132#if FULL_SYSTEM
133    delete kernelSymtab;
134    delete kernel;
135
136    delete kernelBinning;
137#else
138    panic("System::fixFuncEventAddr needs to be rewritten "
139          "to work with syscall emulation");
140#endif // FULL_SYSTEM}
141}
142
143#if FULL_SYSTEM
144
145
146int rgdb_wait = -1;
147
148#endif // FULL_SYSTEM
149
150int
151System::registerThreadContext(ThreadContext *tc, int id)
152{
153    if (id == -1) {
154        for (id = 0; id < threadContexts.size(); id++) {
155            if (!threadContexts[id])
156                break;
157        }
158    }
159
160    if (threadContexts.size() <= id)
161        threadContexts.resize(id + 1);
162
163    if (threadContexts[id])
164        panic("Cannot have two CPUs with the same id (%d)\n", id);
165
166    threadContexts[id] = tc;
167    numcpus++;
168
169#if FULL_SYSTEM
170    RemoteGDB *rgdb = new RemoteGDB(this, tc);
171    GDBListener *gdbl = new GDBListener(rgdb, 7000 + id);
172    gdbl->listen();
173    /**
174     * Uncommenting this line waits for a remote debugger to connect
175     * to the simulator before continuing.
176     */
177    if (rgdb_wait != -1 && rgdb_wait == id)
178        gdbl->accept();
179
180    if (remoteGDB.size() <= id) {
181        remoteGDB.resize(id + 1);
182    }
183
184    remoteGDB[id] = rgdb;
185#endif // FULL_SYSTEM
186
187    return id;
188}
189
190void
191System::startup()
192{
193    int i;
194    for (i = 0; i < threadContexts.size(); i++)
195        threadContexts[i]->activate(0);
196}
197
198void
199System::replaceThreadContext(ThreadContext *tc, int id)
200{
201    if (id >= threadContexts.size()) {
202        panic("replaceThreadContext: bad id, %d >= %d\n",
203              id, threadContexts.size());
204    }
205
206    threadContexts[id] = tc;
207#if FULL_SYSTEM
208    remoteGDB[id]->replaceThreadContext(tc);
209#endif // FULL_SYSTEM
210}
211
212#if !FULL_SYSTEM
213Addr
214System::new_page()
215{
216    Addr return_addr = page_ptr << LogVMPageSize;
217    ++page_ptr;
218    return return_addr;
219}
220#endif
221
222void
223System::regStats()
224{
225#if FULL_SYSTEM
226    kernelBinning->regStats(name() + ".kern");
227#endif // FULL_SYSTEM
228}
229
230void
231System::serialize(ostream &os)
232{
233#if FULL_SYSTEM
234    kernelBinning->serialize(os);
235
236    kernelSymtab->serialize("kernel_symtab", os);
237#endif // FULL_SYSTEM
238}
239
240
241void
242System::unserialize(Checkpoint *cp, const string &section)
243{
244#if FULL_SYSTEM
245    kernelBinning->unserialize(cp, section);
246
247    kernelSymtab->unserialize("kernel_symtab", cp, section);
248#endif // FULL_SYSTEM
249}
250
251void
252System::printSystems()
253{
254    vector<System *>::iterator i = systemList.begin();
255    vector<System *>::iterator end = systemList.end();
256    for (; i != end; ++i) {
257        System *sys = *i;
258        cerr << "System " << sys->name() << ": " << hex << sys << endl;
259    }
260}
261
262extern "C"
263void
264printSystems()
265{
266    System::printSystems();
267}
268
269#if FULL_SYSTEM
270
271// In full system mode, only derived classes (e.g. AlphaLinuxSystem)
272// can be created directly.
273
274DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
275
276#else
277
278BEGIN_DECLARE_SIM_OBJECT_PARAMS(System)
279
280    SimObjectParam<PhysicalMemory *> physmem;
281
282END_DECLARE_SIM_OBJECT_PARAMS(System)
283
284BEGIN_INIT_SIM_OBJECT_PARAMS(System)
285
286    INIT_PARAM(physmem, "physical memory")
287
288END_INIT_SIM_OBJECT_PARAMS(System)
289
290CREATE_SIM_OBJECT(System)
291{
292    System::Params *p = new System::Params;
293    p->name = getInstanceName();
294    p->physmem = physmem;
295    return new System(p);
296}
297
298REGISTER_SIM_OBJECT("System", System)
299
300#endif
301