system.cc revision 2640 
1#include "arch/isa_traits.hh"
2#include "base/loader/object_file.hh"
3#include "base/loader/symtab.hh"
4#include "base/trace.hh"
5#include "cpu/exec_context.hh"
6#include "mem/mem_object.hh"
7#include "mem/physical.hh"
8#include "sim/builder.hh"
9#include "sim/byteswap.hh"
10#include "sim/system.hh"
11#if FULL_SYSTEM
12#include "arch/vtophys.hh"
13#include "base/remote_gdb.hh"
14#include "kern/kernel_stats.hh"
15#endif
16
17using namespace std;
18using namespace TheISA;
19
20vector<System *> System::systemList;
21
22int System::numSystemsRunning = 0;
23
24System::System(Params *p)
25    : SimObject(p->name), physmem(p->physmem), numcpus(0),
26#if FULL_SYSTEM
27      init_param(p->init_param),
28      functionalPort(p->name + "-fport"),
29      virtPort(p->name + "-vport"),
30#else
31      page_ptr(0),
32#endif
33      _params(p)
34{
35    // add self to global system list
36    systemList.push_back(this);
37
38#if FULL_SYSTEM
39    kernelSymtab = new SymbolTable;
40    debugSymbolTable = new SymbolTable;
41
42
43    /**
44     * Get a functional port to memory
45     */
46    Port *mem_port;
47    mem_port = physmem->getPort("functional");
48    functionalPort.setPeer(mem_port);
49    mem_port->setPeer(&functionalPort);
50
51    mem_port = physmem->getPort("functional");
52    virtPort.setPeer(mem_port);
53    mem_port->setPeer(&virtPort);
54
55
56    /**
57     * Load the kernel code into memory
58     */
59    // Load kernel code
60    kernel = createObjectFile(params()->kernel_path);
61    if (kernel == NULL)
62        fatal("Could not load kernel file %s", params()->kernel_path);
63
64    // Load program sections into memory
65    kernel->loadSections(&functionalPort, LoadAddrMask);
66
67    // setup entry points
68    kernelStart = kernel->textBase();
69    kernelEnd = kernel->bssBase() + kernel->bssSize();
70    kernelEntry = kernel->entryPoint();
71
72    // load symbols
73    if (!kernel->loadGlobalSymbols(kernelSymtab))
74        panic("could not load kernel symbols\n");
75
76    if (!kernel->loadLocalSymbols(kernelSymtab))
77        panic("could not load kernel local symbols\n");
78
79    if (!kernel->loadGlobalSymbols(debugSymbolTable))
80        panic("could not load kernel symbols\n");
81
82    if (!kernel->loadLocalSymbols(debugSymbolTable))
83        panic("could not load kernel local symbols\n");
84
85    DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
86    DPRINTF(Loader, "Kernel end   = %#x\n", kernelEnd);
87    DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
88    DPRINTF(Loader, "Kernel loaded...\n");
89
90    kernelBinning = new Kernel::Binning(this);
91#endif // FULL_SYSTEM
92
93    // increment the number of running systms
94    numSystemsRunning++;
95}
96
97System::~System()
98{
99#if FULL_SYSTEM
100    delete kernelSymtab;
101    delete kernel;
102
103    delete kernelBinning;
104#else
105    panic("System::fixFuncEventAddr needs to be rewritten "
106          "to work with syscall emulation");
107#endif // FULL_SYSTEM}
108}
109
110#if FULL_SYSTEM
111
112
113int rgdb_wait = -1;
114
115#endif // FULL_SYSTEM
116
117int
118System::registerExecContext(ExecContext *xc, int id)
119{
120    if (id == -1) {
121        for (id = 0; id < execContexts.size(); id++) {
122            if (!execContexts[id])
123                break;
124        }
125    }
126
127    if (execContexts.size() <= id)
128        execContexts.resize(id + 1);
129
130    if (execContexts[id])
131        panic("Cannot have two CPUs with the same id (%d)\n", id);
132
133    execContexts[id] = xc;
134    numcpus++;
135
136#if FULL_SYSTEM
137    RemoteGDB *rgdb = new RemoteGDB(this, xc);
138    GDBListener *gdbl = new GDBListener(rgdb, 7000 + id);
139    gdbl->listen();
140    /**
141     * Uncommenting this line waits for a remote debugger to connect
142     * to the simulator before continuing.
143     */
144    if (rgdb_wait != -1 && rgdb_wait == id)
145        gdbl->accept();
146
147    if (remoteGDB.size() <= id) {
148        remoteGDB.resize(id + 1);
149    }
150
151    remoteGDB[id] = rgdb;
152#endif // FULL_SYSTEM
153
154    return id;
155}
156
157void
158System::startup()
159{
160    int i;
161    for (i = 0; i < execContexts.size(); i++)
162        execContexts[i]->activate(0);
163}
164
165void
166System::replaceExecContext(ExecContext *xc, int id)
167{
168    if (id >= execContexts.size()) {
169        panic("replaceExecContext: bad id, %d >= %d\n",
170              id, execContexts.size());
171    }
172
173    execContexts[id] = xc;
174#if FULL_SYSTEM
175    remoteGDB[id]->replaceExecContext(xc);
176#endif // FULL_SYSTEM
177}
178
179#if !FULL_SYSTEM
180Addr
181System::new_page()
182{
183    Addr return_addr = page_ptr << LogVMPageSize;
184    ++page_ptr;
185    return return_addr;
186}
187#endif
188
189void
190System::regStats()
191{
192#if FULL_SYSTEM
193    kernelBinning->regStats(name() + ".kern");
194#endif // FULL_SYSTEM
195}
196
197void
198System::serialize(ostream &os)
199{
200#if FULL_SYSTEM
201    kernelBinning->serialize(os);
202
203    kernelSymtab->serialize("kernel_symtab", os);
204#endif // FULL_SYSTEM
205}
206
207
208void
209System::unserialize(Checkpoint *cp, const string &section)
210{
211#if FULL_SYSTEM
212    kernelBinning->unserialize(cp, section);
213
214    kernelSymtab->unserialize("kernel_symtab", cp, section);
215#endif // FULL_SYSTEM
216}
217
218void
219System::printSystems()
220{
221    vector<System *>::iterator i = systemList.begin();
222    vector<System *>::iterator end = systemList.end();
223    for (; i != end; ++i) {
224        System *sys = *i;
225        cerr << "System " << sys->name() << ": " << hex << sys << endl;
226    }
227}
228
229extern "C"
230void
231printSystems()
232{
233    System::printSystems();
234}
235
236#if FULL_SYSTEM
237
238// In full system mode, only derived classes (e.g. AlphaLinuxSystem)
239// can be created directly.
240
241DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
242
243#else
244
245BEGIN_DECLARE_SIM_OBJECT_PARAMS(System)
246
247    SimObjectParam<PhysicalMemory *> physmem;
248
249END_DECLARE_SIM_OBJECT_PARAMS(System)
250
251BEGIN_INIT_SIM_OBJECT_PARAMS(System)
252
253    INIT_PARAM(physmem, "physical memory")
254
255END_INIT_SIM_OBJECT_PARAMS(System)
256
257CREATE_SIM_OBJECT(System)
258{
259    System::Params *p = new System::Params;
260    p->name = getInstanceName();
261    p->physmem = physmem;
262    return new System(p);
263}
264
265REGISTER_SIM_OBJECT("System", System)
266
267#endif
268