system.hh revision 5795
1/* 2 * Copyright (c) 2002-2005 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 */ 32 33#ifndef __SYSTEM_HH__ 34#define __SYSTEM_HH__ 35 36#include <string> 37#include <vector> 38 39#include "base/loader/symtab.hh" 40#include "base/misc.hh" 41#include "base/statistics.hh" 42#include "config/full_system.hh" 43#include "cpu/pc_event.hh" 44#include "enums/MemoryMode.hh" 45#include "mem/port.hh" 46#include "params/System.hh" 47#include "sim/sim_object.hh" 48#if FULL_SYSTEM 49#include "kern/system_events.hh" 50#include "mem/vport.hh" 51#endif 52 53class BaseCPU; 54class ThreadContext; 55class ObjectFile; 56class PhysicalMemory; 57 58#if FULL_SYSTEM 59class Platform; 60#endif 61class GDBListener; 62namespace TheISA 63{ 64 class RemoteGDB; 65} 66 67class System : public SimObject 68{ 69 public: 70 71 static const char *MemoryModeStrings[3]; 72 73 Enums::MemoryMode 74 getMemoryMode() 75 { 76 assert(memoryMode); 77 return memoryMode; 78 } 79 80 /** Change the memory mode of the system. This should only be called by the 81 * python!! 82 * @param mode Mode to change to (atomic/timing) 83 */ 84 void setMemoryMode(Enums::MemoryMode mode); 85 86 PhysicalMemory *physmem; 87 PCEventQueue pcEventQueue; 88 89 std::vector<ThreadContext *> threadContexts; 90 int _numContexts; 91 92 ThreadContext * getThreadContext(int tid) 93 { 94 return threadContexts[tid]; 95 } 96 97 int numContexts() 98 { 99 if (_numContexts != threadContexts.size()) 100 panic("cpu array not fully populated!"); 101 102 return _numContexts; 103 } 104 105#if FULL_SYSTEM 106 Platform *platform; 107 uint64_t init_param; 108 109 /** Port to physical memory used for writing object files into ram at 110 * boot.*/ 111 FunctionalPort functionalPort; 112 VirtualPort virtPort; 113 114 /** kernel symbol table */ 115 SymbolTable *kernelSymtab; 116 117 /** Object pointer for the kernel code */ 118 ObjectFile *kernel; 119 120 /** Begining of kernel code */ 121 Addr kernelStart; 122 123 /** End of kernel code */ 124 Addr kernelEnd; 125 126 /** Entry point in the kernel to start at */ 127 Addr kernelEntry; 128 129#else 130 131 int page_ptr; 132 133 protected: 134 uint64_t next_PID; 135 136 public: 137 uint64_t allocatePID() 138 { 139 return next_PID++; 140 } 141 142 /** Amount of physical memory that is still free */ 143 Addr freeMemSize(); 144 145 /** Amount of physical memory that exists */ 146 Addr memSize(); 147 148 149#endif // FULL_SYSTEM 150 151 protected: 152 Enums::MemoryMode memoryMode; 153 154#if FULL_SYSTEM 155 /** 156 * Fix up an address used to match PCs for hooking simulator 157 * events on to target function executions. See comment in 158 * system.cc for details. 159 */ 160 virtual Addr fixFuncEventAddr(Addr addr) = 0; 161 162 /** 163 * Add a function-based event to the given function, to be looked 164 * up in the specified symbol table. 165 */ 166 template <class T> 167 T *addFuncEvent(SymbolTable *symtab, const char *lbl) 168 { 169 Addr addr = 0; // initialize only to avoid compiler warning 170 171 if (symtab->findAddress(lbl, addr)) { 172 T *ev = new T(&pcEventQueue, lbl, fixFuncEventAddr(addr)); 173 return ev; 174 } 175 176 return NULL; 177 } 178 179 /** Add a function-based event to kernel code. */ 180 template <class T> 181 T *addKernelFuncEvent(const char *lbl) 182 { 183 return addFuncEvent<T>(kernelSymtab, lbl); 184 } 185 186#endif 187 public: 188 std::vector<TheISA::RemoteGDB *> remoteGDB; 189 std::vector<GDBListener *> gdbListen; 190 bool breakpoint(); 191 192 public: 193 typedef SystemParams Params; 194 195 protected: 196 Params *_params; 197 198 public: 199 System(Params *p); 200 ~System(); 201 202 void startup(); 203 204 const Params *params() const { return (const Params *)_params; } 205 206 public: 207 208#if FULL_SYSTEM 209 /** 210 * Returns the addess the kernel starts at. 211 * @return address the kernel starts at 212 */ 213 Addr getKernelStart() const { return kernelStart; } 214 215 /** 216 * Returns the addess the kernel ends at. 217 * @return address the kernel ends at 218 */ 219 Addr getKernelEnd() const { return kernelEnd; } 220 221 /** 222 * Returns the addess the entry point to the kernel code. 223 * @return entry point of the kernel code 224 */ 225 Addr getKernelEntry() const { return kernelEntry; } 226 227#else 228 229 Addr new_page(); 230 231#endif // FULL_SYSTEM 232 233 int registerThreadContext(ThreadContext *tc, int assigned=-1); 234 void replaceThreadContext(ThreadContext *tc, int context_id); 235 236 void serialize(std::ostream &os); 237 void unserialize(Checkpoint *cp, const std::string §ion); 238 239 public: 240 //////////////////////////////////////////// 241 // 242 // STATIC GLOBAL SYSTEM LIST 243 // 244 //////////////////////////////////////////// 245 246 static std::vector<System *> systemList; 247 static int numSystemsRunning; 248 249 static void printSystems(); 250 251 252}; 253 254#endif // __SYSTEM_HH__ 255