riscv/sim.h

   1 #ifndef _RISCV_SIM_H
   2 #define _RISCV_SIM_H
   3
   4 #include <vector>
   5 #include <string>
   6 #include "processor.h"
   7 #include "mmu.h"
   8
   9 class htif_t;
  10
  11 // this class encapsulates the processors and memory in a RISC-V machine.
  12 class sim_t
  13 {
  14 public:
  15   sim_t(int _nprocs, htif_t* _htif);
  16   ~sim_t();
  17
  18   // run the simulation to completion
  19   void run(bool debug);
  20
  21   // deliver an IPI to a specific processor
  22   void send_ipi(reg_t who);
  23
  24   // returns the number of processors in this simulator
  25   size_t num_cores() { return procs.size(); }
  26
  27 private:
  28   htif_t* htif;
  29
  30   // main memory, shared between processors
  31   char* mem;
  32   size_t memsz; // memory size in bytes
  33   mmu_t* mmu; // debug port into main memory
  34
  35   // processors
  36   std::vector<processor_t*> procs;
  37
  38   // terminate the simulation loop after the current iteration
  39   void stop() { running = false; }
  40   bool running;
  41   size_t steps;
  42
  43   // run each processor for n instructions; interleave instructions are
  44   // run on a processor before moving on to the next processor.
  45   // interleave must divide n.
  46   // if noisy, print out the instructions as they execute.
  47   void step_all(size_t n, size_t interleave, bool noisy);
  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_run_proc(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  58   void interactive_run_proc_noisy(const std::string& cmd, const std::vector<std::string>& args);
  59   void interactive_run_proc_silent(const std::string& cmd, const std::vector<std::string>& args);
  60   void interactive_reg(const std::string& cmd, const std::vector<std::string>& args);
  61   void interactive_fregs(const std::string& cmd, const std::vector<std::string>& args);
  62   void interactive_fregd(const std::string& cmd, const std::vector<std::string>& args);
  63   void interactive_mem(const std::string& cmd, const std::vector<std::string>& args);
  64   void interactive_str(const std::string& cmd, const std::vector<std::string>& args);
  65   void interactive_until(const std::string& cmd, const std::vector<std::string>& args);
  66   reg_t get_reg(const std::vector<std::string>& args);
  67   reg_t get_freg(const std::vector<std::string>& args);
  68   reg_t get_mem(const std::vector<std::string>& args);
  69   reg_t get_pc(const std::vector<std::string>& args);
  70   reg_t get_tohost(const std::vector<std::string>& args);
  71
  72   friend class htif_t;
  73 };
  74
  75 #endif