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 "cpu/pc_event.hh" 45#include "enums/MemoryMode.hh" 46#include "kern/system_events.hh" 47#include "mem/port.hh" 48#include "params/System.hh" 49#include "sim/sim_object.hh" 50 51class BaseCPU; 52class BaseRemoteGDB; 53class FunctionalPort; 54class GDBListener; 55class ObjectFile; 56class PhysicalMemory; 57class Platform; 58class ThreadContext; 59class VirtualPort; 60 61class System : public SimObject 62{ 63 public: 64 65 static const char *MemoryModeStrings[3]; 66 67 Enums::MemoryMode 68 getMemoryMode() 69 { 70 assert(memoryMode); 71 return memoryMode; 72 } 73 74 /** Change the memory mode of the system. This should only be called by the 75 * python!! 76 * @param mode Mode to change to (atomic/timing) 77 */ 78 void setMemoryMode(Enums::MemoryMode mode); 79 80 PhysicalMemory *physmem; 81 PCEventQueue pcEventQueue; 82 83 std::vector<ThreadContext *> threadContexts; 84 int _numContexts; 85 86 ThreadContext *getThreadContext(ThreadID tid) 87 { 88 return threadContexts[tid]; 89 } 90 91 int numContexts() 92 { 93 assert(_numContexts == (int)threadContexts.size()); 94 return _numContexts; 95 } 96 97 /** Return number of running (non-halted) thread contexts in 98 * system. These threads could be Active or Suspended. */ 99 int numRunningContexts(); 100 101 /** List to store ranges of memories in this system */ 102 AddrRangeList memRanges; 103 104 /** check if an address points to valid system memory 105 * and thus we can fetch instructions out of it 106 */ 107 bool isMemory(const Addr addr) const; 108 109 Addr pagePtr; 110 111 uint64_t init_param; 112 113 /** Port to physical memory used for writing object files into ram at 114 * boot.*/ 115 FunctionalPort *functionalPort; 116 VirtualPort *virtPort; 117 118 /** kernel symbol table */ 119 SymbolTable *kernelSymtab; 120 121 /** Object pointer for the kernel code */ 122 ObjectFile *kernel; 123 124 /** Begining of kernel code */ 125 Addr kernelStart; 126 127 /** End of kernel code */ 128 Addr kernelEnd; 129 130 /** Entry point in the kernel to start at */ 131 Addr kernelEntry; 132 133 /** Mask that should be anded for binary/symbol loading. 134 * This allows one two different OS requirements for the same ISA to be 135 * handled. Some OSes are compiled for a virtual address and need to be 136 * loaded into physical memory that starts at address 0, while other 137 * bare metal tools generate images that start at address 0. 138 */ 139 Addr loadAddrMask; 140 141 protected: 142 uint64_t nextPID; 143 144 public: 145 uint64_t allocatePID() 146 { 147 return nextPID++; 148 } 149 150 /** Amount of physical memory that is still free */ 151 Addr freeMemSize(); 152 153 /** Amount of physical memory that exists */ 154 Addr memSize(); 155 156 protected: 157 Enums::MemoryMode memoryMode; 158 uint64_t workItemsBegin; 159 uint64_t workItemsEnd; 160 std::vector<bool> activeCpus; 161 162 public: 163 /** 164 * Called by pseudo_inst to track the number of work items started by this 165 * system. 166 */ 167 uint64_t 168 incWorkItemsBegin() 169 { 170 return ++workItemsBegin; 171 } 172 173 /** 174 * Called by pseudo_inst to track the number of work items completed by 175 * this system. 176 */ 177 uint64_t 178 incWorkItemsEnd() 179 { 180 return ++workItemsEnd; 181 } 182 183 /** 184 * Called by pseudo_inst to mark the cpus actively executing work items. 185 * Returns the total number of cpus that have executed work item begin or 186 * ends. 187 */ 188 int 189 markWorkItem(int index) 190 { 191 int count = 0; 192 assert(index < activeCpus.size()); 193 activeCpus[index] = true; 194 for (std::vector<bool>::iterator i = activeCpus.begin(); 195 i < activeCpus.end(); i++) { 196 if (*i) count++; 197 } 198 return count; 199 } 200 201 /** 202 * Fix up an address used to match PCs for hooking simulator 203 * events on to target function executions. See comment in 204 * system.cc for details. 205 */ 206 virtual Addr fixFuncEventAddr(Addr addr) 207 { 208 panic("Base fixFuncEventAddr not implemented.\n"); 209 } 210 211 /** 212 * Add a function-based event to the given function, to be looked 213 * up in the specified symbol table. 214 */ 215 template <class T> 216 T *addFuncEvent(SymbolTable *symtab, const char *lbl) 217 { 218 Addr addr = 0; // initialize only to avoid compiler warning 219 220 if (symtab->findAddress(lbl, addr)) { 221 T *ev = new T(&pcEventQueue, lbl, fixFuncEventAddr(addr)); 222 return ev; 223 } 224 225 return NULL; 226 } 227 228 /** Add a function-based event to kernel code. */ 229 template <class T> 230 T *addKernelFuncEvent(const char *lbl) 231 { 232 return addFuncEvent<T>(kernelSymtab, lbl); 233 } 234 235 public: 236 std::vector<BaseRemoteGDB *> remoteGDB; 237 std::vector<GDBListener *> gdbListen; 238 bool breakpoint(); 239 240 public: 241 typedef SystemParams Params; 242 243 protected: 244 Params *_params; 245 246 public: 247 System(Params *p); 248 ~System(); 249 250 void initState(); 251 252 const Params *params() const { return (const Params *)_params; } 253 254 public: 255 256 /** 257 * Returns the addess the kernel starts at. 258 * @return address the kernel starts at 259 */ 260 Addr getKernelStart() const { return kernelStart; } 261 262 /** 263 * Returns the addess the kernel ends at. 264 * @return address the kernel ends at 265 */ 266 Addr getKernelEnd() const { return kernelEnd; } 267 268 /** 269 * Returns the addess the entry point to the kernel code. 270 * @return entry point of the kernel code 271 */ 272 Addr getKernelEntry() const { return kernelEntry; } 273
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