system.cc revision 2422 
1#include "base/loader/object_file.hh"
2#include "base/loader/symtab.hh"
3#include "cpu/exec_context.hh"
4#include "arch/vtophys.hh"
5#include "mem/memory.hh"
6#include "sim/builder.hh"
7#include "arch/isa_traits.hh"
8#include "sim/byteswap.hh"
9#include "sim/system.hh"
10#include "base/trace.hh"
11#if FULL_SYSTEM
12#include "base/remote_gdb.hh"
13#include "kern/kernel_stats.hh"
14#include "mem/functional/memory_control.hh"
15#include "targetarch/vtophys.hh"
16#endif
17
18using namespace std;
19using namespace TheISA;
20
21vector<System *> System::systemList;
22
23int System::numSystemsRunning = 0;
24
25System::System(Params *p)
26    : SimObject(p->name), physmem(p->physmem), numcpus(0),
27#if FULL_SYSTEM
28      memctrl(p->memctrl), init_param(p->init_param),
29#else
30      page_ptr(0),
31#endif
32      _params(p)
33{
34    // add self to global system list
35    systemList.push_back(this);
36
37#if FULL_SYSTEM
38    kernelSymtab = new SymbolTable;
39    debugSymbolTable = new SymbolTable;
40
41    /**
42     * Load the kernel code into memory
43     */
44    // Load kernel code
45    kernel = createObjectFile(params()->kernel_path);
46    if (kernel == NULL)
47        fatal("Could not load kernel file %s", params()->kernel_path);
48
49    // Load program sections into memory
50    kernel->loadSections(physmem, true);
51
52    // setup entry points
53    kernelStart = kernel->textBase();
54    kernelEnd = kernel->bssBase() + kernel->bssSize();
55    kernelEntry = kernel->entryPoint();
56
57    // load symbols
58    if (!kernel->loadGlobalSymbols(kernelSymtab))
59        panic("could not load kernel symbols\n");
60
61    if (!kernel->loadLocalSymbols(kernelSymtab))
62        panic("could not load kernel local symbols\n");
63
64    if (!kernel->loadGlobalSymbols(debugSymbolTable))
65        panic("could not load kernel symbols\n");
66
67    if (!kernel->loadLocalSymbols(debugSymbolTable))
68        panic("could not load kernel local symbols\n");
69
70    DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
71    DPRINTF(Loader, "Kernel end   = %#x\n", kernelEnd);
72    DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
73    DPRINTF(Loader, "Kernel loaded...\n");
74
75#if FULL_SYSTEM
76    kernelBinning = new Kernel::Binning(this);
77#endif // FULL_SYSTEM
78
79    // increment the number of running systms
80    numSystemsRunning++;
81}
82
83System::~System()
84{
85#if FULL_SYSTEM
86    delete kernelSymtab;
87    delete kernel;
88
89    delete kernelBinning;
90#else
91    panic("System::fixFuncEventAddr needs to be rewritten "
92          "to work with syscall emulation");
93#endif // FULL_SYSTEM}
94}
95
96#if FULL_SYSTEM
97
98
99int rgdb_wait = -1;
100
101#endif // FULL_SYSTEM
102
103int
104System::registerExecContext(ExecContext *xc, int id)
105{
106    if (id == -1) {
107        for (id = 0; id < execContexts.size(); id++) {
108            if (!execContexts[id])
109                break;
110        }
111    }
112
113    if (execContexts.size() <= id)
114        execContexts.resize(id + 1);
115
116    if (execContexts[id])
117        panic("Cannot have two CPUs with the same id (%d)\n", id);
118
119    execContexts[id] = xc;
120    numcpus++;
121
122#if FULL_SYSTEM
123    RemoteGDB *rgdb = new RemoteGDB(this, xc);
124    GDBListener *gdbl = new GDBListener(rgdb, 7000 + id);
125    gdbl->listen();
126    /**
127     * Uncommenting this line waits for a remote debugger to connect
128     * to the simulator before continuing.
129     */
130    if (rgdb_wait != -1 && rgdb_wait == id)
131        gdbl->accept();
132
133    if (remoteGDB.size() <= id) {
134        remoteGDB.resize(id + 1);
135    }
136
137    remoteGDB[id] = rgdb;
138#endif // FULL_SYSTEM
139
140    return id;
141}
142
143void
144System::startup()
145{
146    int i;
147    for (i = 0; i < execContexts.size(); i++)
148        execContexts[i]->activate(0);
149}
150
151void
152System::replaceExecContext(ExecContext *xc, int id)
153{
154    if (id >= execContexts.size()) {
155        panic("replaceExecContext: bad id, %d >= %d\n",
156              id, execContexts.size());
157    }
158
159    execContexts[id] = xc;
160#if FULL_SYSTEM
161    remoteGDB[id]->replaceExecContext(xc);
162#endif // FULL_SYSTEM
163}
164
165#if !FULL_SYSTEM
166Addr
167System::new_page()
168{
169    Addr return_addr = page_ptr << LogVMPageSize;
170    ++page_ptr;
171    return return_addr;
172}
173#endif
174
175void
176System::regStats()
177{
178#if FULL_SYSTEM
179    kernelBinning->regStats(name() + ".kern");
180#endif // FULL_SYSTEM
181}
182
183void
184System::serialize(ostream &os)
185{
186#if FULL_SYSTEM
187    kernelBinning->serialize(os);
188
189    kernelSymtab->serialize("kernel_symtab", os);
190#endif // FULL_SYSTEM
191}
192
193
194void
195System::unserialize(Checkpoint *cp, const string &section)
196{
197#if FULL_SYSTEM
198    kernelBinning->unserialize(cp, section);
199
200    kernelSymtab->unserialize("kernel_symtab", cp, section);
201#endif // FULL_SYSTEM
202}
203
204void
205System::printSystems()
206{
207    vector<System *>::iterator i = systemList.begin();
208    vector<System *>::iterator end = systemList.end();
209    for (; i != end; ++i) {
210        System *sys = *i;
211        cerr << "System " << sys->name() << ": " << hex << sys << endl;
212    }
213}
214
215extern "C"
216void
217printSystems()
218{
219    System::printSystems();
220}
221
222DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
223
224