system.cc revision 2802:babfc298ac86 
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#endif // FULL_SYSTEM
123
124    // increment the number of running systms
125    numSystemsRunning++;
126}
127
128System::~System()
129{
130#if FULL_SYSTEM
131    delete kernelSymtab;
132    delete kernel;
133#else
134    panic("System::fixFuncEventAddr needs to be rewritten "
135          "to work with syscall emulation");
136#endif // FULL_SYSTEM}
137}
138
139#if FULL_SYSTEM
140
141
142int rgdb_wait = -1;
143
144#endif // FULL_SYSTEM
145
146int
147System::registerThreadContext(ThreadContext *tc, int id)
148{
149    if (id == -1) {
150        for (id = 0; id < threadContexts.size(); id++) {
151            if (!threadContexts[id])
152                break;
153        }
154    }
155
156    if (threadContexts.size() <= id)
157        threadContexts.resize(id + 1);
158
159    if (threadContexts[id])
160        panic("Cannot have two CPUs with the same id (%d)\n", id);
161
162    threadContexts[id] = tc;
163    numcpus++;
164
165#if FULL_SYSTEM
166    RemoteGDB *rgdb = new RemoteGDB(this, tc);
167    GDBListener *gdbl = new GDBListener(rgdb, 7000 + id);
168    gdbl->listen();
169    /**
170     * Uncommenting this line waits for a remote debugger to connect
171     * to the simulator before continuing.
172     */
173    if (rgdb_wait != -1 && rgdb_wait == id)
174        gdbl->accept();
175
176    if (remoteGDB.size() <= id) {
177        remoteGDB.resize(id + 1);
178    }
179
180    remoteGDB[id] = rgdb;
181#endif // FULL_SYSTEM
182
183    return id;
184}
185
186void
187System::startup()
188{
189    int i;
190    for (i = 0; i < threadContexts.size(); i++)
191        threadContexts[i]->activate(0);
192}
193
194void
195System::replaceThreadContext(ThreadContext *tc, int id)
196{
197    if (id >= threadContexts.size()) {
198        panic("replaceThreadContext: bad id, %d >= %d\n",
199              id, threadContexts.size());
200    }
201
202    threadContexts[id] = tc;
203#if FULL_SYSTEM
204    remoteGDB[id]->replaceThreadContext(tc);
205#endif // FULL_SYSTEM
206}
207
208#if !FULL_SYSTEM
209Addr
210System::new_page()
211{
212    Addr return_addr = page_ptr << LogVMPageSize;
213    ++page_ptr;
214    return return_addr;
215}
216#endif
217
218void
219System::serialize(ostream &os)
220{
221#if FULL_SYSTEM
222    kernelSymtab->serialize("kernel_symtab", os);
223#endif // FULL_SYSTEM
224}
225
226
227void
228System::unserialize(Checkpoint *cp, const string &section)
229{
230#if FULL_SYSTEM
231    kernelSymtab->unserialize("kernel_symtab", cp, section);
232#endif // FULL_SYSTEM
233}
234
235void
236System::printSystems()
237{
238    vector<System *>::iterator i = systemList.begin();
239    vector<System *>::iterator end = systemList.end();
240    for (; i != end; ++i) {
241        System *sys = *i;
242        cerr << "System " << sys->name() << ": " << hex << sys << endl;
243    }
244}
245
246void
247printSystems()
248{
249    System::printSystems();
250}
251
252#if FULL_SYSTEM
253
254// In full system mode, only derived classes (e.g. AlphaLinuxSystem)
255// can be created directly.
256
257DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
258
259#else
260
261BEGIN_DECLARE_SIM_OBJECT_PARAMS(System)
262
263    SimObjectParam<PhysicalMemory *> physmem;
264
265END_DECLARE_SIM_OBJECT_PARAMS(System)
266
267BEGIN_INIT_SIM_OBJECT_PARAMS(System)
268
269    INIT_PARAM(physmem, "physical memory")
270
271END_INIT_SIM_OBJECT_PARAMS(System)
272
273CREATE_SIM_OBJECT(System)
274{
275    System::Params *p = new System::Params;
276    p->name = getInstanceName();
277    p->physmem = physmem;
278    return new System(p);
279}
280
281REGISTER_SIM_OBJECT("System", System)
282
283#endif
284