riscv/sim.h

   1 // See LICENSE for license details.
   2
   3 #ifndef _RISCV_SIM_H
   4 #define _RISCV_SIM_H
   5
   6 #include <vector>
   7 #include <string>
   8 #include <memory>
   9 #include "processor.h"
  10 #include "mmu.h"
  11
  12 class htif_isasim_t;
  13
  14 // this class encapsulates the processors and memory in a RISC-V machine.
  15 class sim_t
  16 {
  17 public:
  18   sim_t(size_t _nprocs, size_t mem_mb, const std::vector<std::string>& htif_args);
  19   ~sim_t();
  20
  21   // run the simulation to completion
  22   void run();
  23   void stop();
  24   void set_debug(bool value) { debug = value; }
  25
  26   // deliver an IPI to a specific processor
  27   void send_ipi(reg_t who);
  28
  29   // returns the number of processors in this simulator
  30   size_t num_cores() { return procs.size(); }
  31   processor_t* get_core(size_t i) { return procs[i]; }
  32
  33   // read one of the system control registers
  34   reg_t get_scr(int which);
  35
  36 private:
  37   std::auto_ptr<htif_isasim_t> htif;
  38   char* mem; // main memory
  39   size_t memsz; // memory size in bytes
  40   mmu_t* mmu; // debug port into main memory
  41   std::vector<processor_t*> procs;
  42
  43   void step(size_t n, bool noisy); // step through simulation
  44   static const size_t INTERLEAVE = 1000;
  45   size_t current_step;
  46   size_t current_proc;
  47   bool debug;
  48
  49   // presents a prompt for introspection into the simulation
  50   void interactive();
  51
  52   // functions that help implement interactive()
  53   void interactive_quit(const std::string& cmd, const std::vector<std::string>& args);
  54   void interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  55   void interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args);
  56   void interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args);
  57   void interactive_reg(const std::string& cmd, const std::vector<std::string>& args);
  58   void interactive_fregs(const std::string& cmd, const std::vector<std::string>& args);
  59   void interactive_fregd(const std::string& cmd, const std::vector<std::string>& args);
  60   void interactive_mem(const std::string& cmd, const std::vector<std::string>& args);
  61   void interactive_str(const std::string& cmd, const std::vector<std::string>& args);
  62   void interactive_until(const std::string& cmd, const std::vector<std::string>& args);
  63   reg_t get_reg(const std::vector<std::string>& args);
  64   reg_t get_freg(const std::vector<std::string>& args);
  65   reg_t get_mem(const std::vector<std::string>& args);
  66   reg_t get_pc(const std::vector<std::string>& args);
  67   reg_t get_tohost(const std::vector<std::string>& args);
  68
  69   friend class htif_isasim_t;
  70 };
  71
  72 #endif