system.cc revision 1070 
1/*
2 * Copyright (c) 2002-2004 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
29#include "base/loader/object_file.hh"
30#include "base/loader/symtab.hh"
31#include "base/remote_gdb.hh"
32#include "cpu/exec_context.hh"
33#include "kern/kernel_stats.hh"
34#include "mem/functional_mem/memory_control.hh"
35#include "mem/functional_mem/physical_memory.hh"
36#include "targetarch/vtophys.hh"
37#include "sim/param.hh"
38#include "sim/system.hh"
39#include "base/trace.hh"
40
41using namespace std;
42
43vector<System *> System::systemList;
44
45int System::numSystemsRunning = 0;
46
47extern SymbolTable *debugSymbolTable;
48
49System::System(Params *p)
50    : SimObject(p->name), memctrl(p->memctrl), physmem(p->physmem),
51      init_param(p->init_param), params(p)
52{
53    // add self to global system list
54    systemList.push_back(this);
55
56    kernelSymtab = new SymbolTable;
57    consoleSymtab = new SymbolTable;
58    debugSymbolTable = kernelSymtab;
59
60    /**
61     * Load the kernel, pal, and console code into memory
62     */
63    // Load kernel code
64    kernel = createObjectFile(params->kernel_path);
65    if (kernel == NULL)
66        fatal("Could not load kernel file %s", params->kernel_path);
67
68    // Load Console Code
69    console = createObjectFile(params->console_path);
70    if (console == NULL)
71        fatal("Could not load console file %s", params->console_path);
72
73    // Load pal file
74    pal = createObjectFile(params->palcode);
75    if (pal == NULL)
76        fatal("Could not load PALcode file %s", params->palcode);
77
78
79    // Load program sections into memory
80    pal->loadSections(physmem, true);
81    console->loadSections(physmem, true);
82    kernel->loadSections(physmem, true);
83
84    // setup entry points
85    kernelStart = kernel->textBase();
86    kernelEnd = kernel->bssBase() + kernel->bssSize();
87    kernelEntry = kernel->entryPoint();
88
89    // load symbols
90    if (!kernel->loadGlobalSymbols(kernelSymtab))
91        panic("could not load kernel symbols\n");
92        debugSymbolTable = kernelSymtab;
93
94    if (!kernel->loadLocalSymbols(kernelSymtab))
95        panic("could not load kernel local symbols\n");
96
97    if (!console->loadGlobalSymbols(consoleSymtab))
98        panic("could not load console symbols\n");
99
100    DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
101    DPRINTF(Loader, "Kernel end   = %#x\n", kernelEnd);
102    DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
103    DPRINTF(Loader, "Kernel loaded...\n");
104
105    Addr addr = 0;
106#ifdef DEBUG
107    consolePanicEvent = new BreakPCEvent(&pcEventQueue, "console panic");
108    if (consoleSymtab->findAddress("panic", addr))
109        consolePanicEvent->schedule(addr);
110#endif
111
112    /**
113     * Copy the osflags (kernel arguments) into the consoles
114     * memory. (Presently Linux does not use the console service
115     * routine to get these command line arguments, but Tru64 and
116     * others do.)
117     */
118    if (consoleSymtab->findAddress("env_booted_osflags", addr)) {
119        Addr paddr = vtophys(physmem, addr);
120        char *osflags = (char *)physmem->dma_addr(paddr, sizeof(uint32_t));
121
122        if (osflags)
123              strcpy(osflags, params->boot_osflags.c_str());
124    }
125
126    /**
127     * Set the hardware reset parameter block system type and revision
128     * information to Tsunami.
129     */
130    if (consoleSymtab->findAddress("xxm_rpb", addr)) {
131        Addr paddr = vtophys(physmem, addr);
132        char *hwrpb = (char *)physmem->dma_addr(paddr, sizeof(uint64_t));
133
134        if (!hwrpb)
135            panic("could not translate hwrpb addr\n");
136
137        *(uint64_t*)(hwrpb+0x50) = params->system_type;
138        *(uint64_t*)(hwrpb+0x58) = params->system_rev;
139    } else
140        panic("could not find hwrpb\n");
141
142    // increment the number of running systms
143    numSystemsRunning++;
144
145    kernelBinning = new Kernel::Binning(this);
146}
147
148System::~System()
149{
150    delete kernelSymtab;
151    delete consoleSymtab;
152    delete kernel;
153    delete console;
154    delete pal;
155
156    delete kernelBinning;
157
158#ifdef DEBUG
159    delete consolePanicEvent;
160#endif
161}
162
163bool
164System::breakpoint()
165{
166    return remoteGDB[0]->trap(ALPHA_KENTRY_INT);
167}
168
169int
170System::registerExecContext(ExecContext *xc)
171{
172    int xcIndex = execContexts.size();
173    execContexts.push_back(xc);
174
175    if (xcIndex == 0) {
176        // activate with zero delay so that we start ticking right
177        // away on cycle 0
178        xc->activate(0);
179    }
180
181    RemoteGDB *rgdb = new RemoteGDB(this, xc);
182    GDBListener *gdbl = new GDBListener(rgdb, 7000 + xcIndex);
183    gdbl->listen();
184    /**
185     * Uncommenting this line waits for a remote debugger to connect
186     * to the simulator before continuing.
187     */
188    //gdbl->accept();
189
190    if (remoteGDB.size() <= xcIndex) {
191        remoteGDB.resize(xcIndex+1);
192    }
193
194    remoteGDB[xcIndex] = rgdb;
195
196    return xcIndex;
197}
198
199void
200System::replaceExecContext(ExecContext *xc, int xcIndex)
201{
202    if (xcIndex >= execContexts.size()) {
203        panic("replaceExecContext: bad xcIndex, %d >= %d\n",
204              xcIndex, execContexts.size());
205    }
206
207    execContexts[xcIndex] = xc;
208    remoteGDB[xcIndex]->replaceExecContext(xc);
209}
210
211void
212System::regStats()
213{
214    kernelBinning->regStats(name() + ".kern");
215}
216
217void
218System::serialize(ostream &os)
219{
220    kernelBinning->serialize(os);
221}
222
223
224void
225System::unserialize(Checkpoint *cp, const string &section)
226{
227    kernelBinning->unserialize(cp, section);
228}
229
230void
231System::printSystems()
232{
233    vector<System *>::iterator i = systemList.begin();
234    vector<System *>::iterator end = systemList.end();
235    for (; i != end; ++i) {
236        System *sys = *i;
237        cerr << "System " << sys->name() << ": " << hex << sys << endl;
238    }
239}
240
241extern "C"
242void
243printSystems()
244{
245    System::printSystems();
246}
247
248DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
249
250