sim/system.hh

   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
  29 #ifndef __SYSTEM_HH__
  30 #define __SYSTEM_HH__
  31
  32 #include <string>
  33 #include <vector>
  34
  35 #include "base/loader/symtab.hh"
  36 #include "base/misc.hh"
  37 #include "base/statistics.hh"
  38 #include "cpu/pc_event.hh"
  39 #include "mem/port.hh"
  40 #include "sim/sim_object.hh"
  41 #if FULL_SYSTEM
  42 #include "kern/system_events.hh"
  43 #include "mem/vport.hh"
  44 #endif
  45
  46 class BaseCPU;
  47 class ExecContext;
  48 class ObjectFile;
  49 class PhysicalMemory;
  50
  51 #if FULL_SYSTEM
  52 class Platform;
  53 class GDBListener;
  54 class RemoteGDB;
  55 namespace Kernel { class Binning; }
  56 #endif
  57
  58 class System : public SimObject
  59 {
  60   public:
  61     PhysicalMemory *physmem;
  62     PCEventQueue pcEventQueue;
  63
  64     std::vector<ExecContext *> execContexts;
  65     int numcpus;
  66
  67     int getNumCPUs()
  68     {
  69         if (numcpus != execContexts.size())
  70             panic("cpu array not fully populated!");
  71
  72         return numcpus;
  73     }
  74
  75 #if FULL_SYSTEM
  76     Platform *platform;
  77     uint64_t init_param;
  78
  79     /** Port to physical memory used for writing object files into ram at
  80      * boot.*/
  81     FunctionalPort functionalPort;
  82     VirtualPort virtPort;
  83
  84     /** kernel symbol table */
  85     SymbolTable *kernelSymtab;
  86
  87     /** Object pointer for the kernel code */
  88     ObjectFile *kernel;
  89
  90     /** Begining of kernel code */
  91     Addr kernelStart;
  92
  93     /** End of kernel code */
  94     Addr kernelEnd;
  95
  96     /** Entry point in the kernel to start at */
  97     Addr kernelEntry;
  98
  99     Kernel::Binning *kernelBinning;
 100
 101 #else
 102
 103     int page_ptr;
 104
 105
 106 #endif // FULL_SYSTEM
 107
 108   protected:
 109
 110 #if FULL_SYSTEM
 111     /**
 112      * Fix up an address used to match PCs for hooking simulator
 113      * events on to target function executions.  See comment in
 114      * system.cc for details.
 115      */
 116     virtual Addr fixFuncEventAddr(Addr addr) = 0;
 117
 118     /**
 119      * Add a function-based event to the given function, to be looked
 120      * up in the specified symbol table.
 121      */
 122     template <class T>
 123     T *System::addFuncEvent(SymbolTable *symtab, const char *lbl)
 124     {
 125         Addr addr = 0; // initialize only to avoid compiler warning
 126
 127         if (symtab->findAddress(lbl, addr)) {
 128             T *ev = new T(&pcEventQueue, lbl, fixFuncEventAddr(addr));
 129             return ev;
 130         }
 131
 132         return NULL;
 133     }
 134
 135     /** Add a function-based event to kernel code. */
 136     template <class T>
 137     T *System::addKernelFuncEvent(const char *lbl)
 138     {
 139         return addFuncEvent<T>(kernelSymtab, lbl);
 140     }
 141
 142 #endif
 143   public:
 144 #if FULL_SYSTEM
 145     std::vector<RemoteGDB *> remoteGDB;
 146     std::vector<GDBListener *> gdbListen;
 147     virtual bool breakpoint() = 0;
 148 #endif // FULL_SYSTEM
 149
 150   public:
 151     struct Params
 152     {
 153         std::string name;
 154         PhysicalMemory *physmem;
 155
 156 #if FULL_SYSTEM
 157         Tick boot_cpu_frequency;
 158         uint64_t init_param;
 159         bool bin;
 160         std::vector<std::string> binned_fns;
 161         bool bin_int;
 162
 163         std::string kernel_path;
 164         std::string readfile;
 165 #endif
 166     };
 167
 168   protected:
 169     Params *_params;
 170
 171   public:
 172     System(Params *p);
 173     ~System();
 174
 175     void startup();
 176
 177     const Params *params() const { return (const Params *)_params; }
 178
 179   public:
 180
 181 #if FULL_SYSTEM
 182     /**
 183      * Returns the addess the kernel starts at.
 184      * @return address the kernel starts at
 185      */
 186     Addr getKernelStart() const { return kernelStart; }
 187
 188     /**
 189      * Returns the addess the kernel ends at.
 190      * @return address the kernel ends at
 191      */
 192     Addr getKernelEnd() const { return kernelEnd; }
 193
 194     /**
 195      * Returns the addess the entry point to the kernel code.
 196      * @return entry point of the kernel code
 197      */
 198     Addr getKernelEntry() const { return kernelEntry; }
 199
 200 #else
 201
 202     Addr new_page();
 203
 204 #endif // FULL_SYSTEM
 205
 206     int registerExecContext(ExecContext *xc, int xcIndex);
 207     void replaceExecContext(ExecContext *xc, int xcIndex);
 208
 209     void regStats();
 210     void serialize(std::ostream &os);
 211     void unserialize(Checkpoint *cp, const std::string &section);
 212
 213   public:
 214     ////////////////////////////////////////////
 215     //
 216     // STATIC GLOBAL SYSTEM LIST
 217     //
 218     ////////////////////////////////////////////
 219
 220     static std::vector<System *> systemList;
 221     static int numSystemsRunning;
 222
 223     static void printSystems();
 224
 225
 226 };
 227
 228 #endif // __SYSTEM_HH__