1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * Copyright (c) 2011 Regents of the University of California
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Steve Reinhardt
30 * Lisa Hsu
31 * Nathan Binkert
32 * Rick Strong
33 */
34
35#ifndef __SYSTEM_HH__
36#define __SYSTEM_HH__
37
38#include <string>
39#include <vector>
40
41#include "base/loader/symtab.hh"
42#include "base/misc.hh"
43#include "base/statistics.hh"
44#include "config/full_system.hh"
45#include "cpu/pc_event.hh"
46#include "enums/MemoryMode.hh"
47#include "mem/port.hh"
48#include "params/System.hh"
49#include "sim/sim_object.hh"
50
51#if FULL_SYSTEM
52#include "kern/system_events.hh"
53#endif
54
55class BaseCPU;
56class ThreadContext;
57class ObjectFile;
58class PhysicalMemory;
59
60#if FULL_SYSTEM
61class Platform;
62class FunctionalPort;
63class VirtualPort;
64#endif
65class GDBListener;
66class BaseRemoteGDB;
67
68class System : public SimObject
69{
70 public:
71
72 static const char *MemoryModeStrings[3];
73
74 Enums::MemoryMode
75 getMemoryMode()
76 {
77 assert(memoryMode);
78 return memoryMode;
79 }
80
81 /** Change the memory mode of the system. This should only be called by the
82 * python!!
83 * @param mode Mode to change to (atomic/timing)
84 */
85 void setMemoryMode(Enums::MemoryMode mode);
86
87 PhysicalMemory *physmem;
88 PCEventQueue pcEventQueue;
89
90 std::vector<ThreadContext *> threadContexts;
91 int _numContexts;
92
93 ThreadContext *getThreadContext(ThreadID tid)
94 {
95 return threadContexts[tid];
96 }
97
98 int numContexts()
99 {
100 assert(_numContexts == (int)threadContexts.size());
101 return _numContexts;
102 }
103
104 /** Return number of running (non-halted) thread contexts in
105 * system. These threads could be Active or Suspended. */
106 int numRunningContexts();
107
|
116#if FULL_SYSTEM
117 Platform *platform;
118 uint64_t init_param;
119
120 /** Port to physical memory used for writing object files into ram at
121 * boot.*/
122 FunctionalPort *functionalPort;
123 VirtualPort *virtPort;
124
125 /** kernel symbol table */
126 SymbolTable *kernelSymtab;
127
128 /** Object pointer for the kernel code */
129 ObjectFile *kernel;
130
131 /** Begining of kernel code */
132 Addr kernelStart;
133
134 /** End of kernel code */
135 Addr kernelEnd;
136
137 /** Entry point in the kernel to start at */
138 Addr kernelEntry;
139
140 /** Mask that should be anded for binary/symbol loading.
141 * This allows one two different OS requirements for the same ISA to be
142 * handled. Some OSes are compiled for a virtual address and need to be
143 * loaded into physical memory that starts at address 0, while other
144 * bare metal tools generate images that start at address 0.
145 */
146 Addr loadAddrMask;
147
148#else
149
150 Addr pagePtr;
151
152 protected:
153 uint64_t nextPID;
154
155 public:
156 uint64_t allocatePID()
157 {
158 return nextPID++;
159 }
160
161 /** Amount of physical memory that is still free */
162 Addr freeMemSize();
163
164 /** Amount of physical memory that exists */
165 Addr memSize();
166
167
168#endif // FULL_SYSTEM
169
170 protected:
171 Enums::MemoryMode memoryMode;
172 uint64_t workItemsBegin;
173 uint64_t workItemsEnd;
174 std::vector<bool> activeCpus;
175
176 public:
177 /**
178 * Called by pseudo_inst to track the number of work items started by this
179 * system.
180 */
181 uint64_t
182 incWorkItemsBegin()
183 {
184 return ++workItemsBegin;
185 }
186
187 /**
188 * Called by pseudo_inst to track the number of work items completed by
189 * this system.
190 */
191 uint64_t
192 incWorkItemsEnd()
193 {
194 return ++workItemsEnd;
195 }
196
197 /**
198 * Called by pseudo_inst to mark the cpus actively executing work items.
199 * Returns the total number of cpus that have executed work item begin or
200 * ends.
201 */
202 int
203 markWorkItem(int index)
204 {
205 int count = 0;
206 assert(index < activeCpus.size());
207 activeCpus[index] = true;
208 for (std::vector<bool>::iterator i = activeCpus.begin();
209 i < activeCpus.end(); i++) {
210 if (*i) count++;
211 }
212 return count;
213 }
214
215#if FULL_SYSTEM
216 /**
217 * Fix up an address used to match PCs for hooking simulator
218 * events on to target function executions. See comment in
219 * system.cc for details.
220 */
221 virtual Addr fixFuncEventAddr(Addr addr) = 0;
222
223 /**
224 * Add a function-based event to the given function, to be looked
225 * up in the specified symbol table.
226 */
227 template <class T>
228 T *addFuncEvent(SymbolTable *symtab, const char *lbl)
229 {
230 Addr addr = 0; // initialize only to avoid compiler warning
231
232 if (symtab->findAddress(lbl, addr)) {
233 T *ev = new T(&pcEventQueue, lbl, fixFuncEventAddr(addr));
234 return ev;
235 }
236
237 return NULL;
238 }
239
240 /** Add a function-based event to kernel code. */
241 template <class T>
242 T *addKernelFuncEvent(const char *lbl)
243 {
244 return addFuncEvent<T>(kernelSymtab, lbl);
245 }
246
247#endif
248 public:
249 std::vector<BaseRemoteGDB *> remoteGDB;
250 std::vector<GDBListener *> gdbListen;
251 bool breakpoint();
252
253 public:
254 typedef SystemParams Params;
255
256 protected:
257 Params *_params;
258
259 public:
260 System(Params *p);
261 ~System();
262
263 void initState();
264
265 const Params *params() const { return (const Params *)_params; }
266
267 public:
268
269#if FULL_SYSTEM
270 /**
271 * Returns the addess the kernel starts at.
272 * @return address the kernel starts at
273 */
274 Addr getKernelStart() const { return kernelStart; }
275
276 /**
277 * Returns the addess the kernel ends at.
278 * @return address the kernel ends at
279 */
280 Addr getKernelEnd() const { return kernelEnd; }
281
282 /**
283 * Returns the addess the entry point to the kernel code.
284 * @return entry point of the kernel code
285 */
286 Addr getKernelEntry() const { return kernelEntry; }
287
288#else
289
290 Addr new_page();
291
292#endif // FULL_SYSTEM
293
294 int registerThreadContext(ThreadContext *tc, int assigned=-1);
295 void replaceThreadContext(ThreadContext *tc, int context_id);
296
297 void serialize(std::ostream &os);
298 void unserialize(Checkpoint *cp, const std::string §ion);
299 virtual void resume();
300
301 public:
302 Counter totalNumInsts;
303 EventQueue instEventQueue;
304
305 ////////////////////////////////////////////
306 //
307 // STATIC GLOBAL SYSTEM LIST
308 //
309 ////////////////////////////////////////////
310
311 static std::vector<System *> systemList;
312 static int numSystemsRunning;
313
314 static void printSystems();
315
316
317};
318
319#endif // __SYSTEM_HH__
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