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   // global registers for communication with host machine
  31   reg_t tohost;
  32   reg_t fromhost;
  33
  34   // main memory, shared between processors
  35   char* mem;
  36   size_t memsz; // memory size in bytes
  37   mmu_t* mmu; // debug port into main memory
  38
  39   // processors
  40   std::vector<processor_t*> procs;
  41
  42   // terminate the simulation loop after the current iteration
  43   void stop() { running = false; }
  44   bool running;
  45
  46   // run each processor for n instructions; interleave instructions are
  47   // run on a processor before moving on to the next processor.
  48   // interleave must divide n.
  49   // if noisy, print out the instructions as they execute.
  50   void step_all(size_t n, size_t interleave, bool noisy);
  51
  52   // presents a prompt for introspection into the simulation
  53   void interactive();
  54
  55   // functions that help implement interactive()
  56   void interactive_quit(const std::string& cmd, const std::vector<std::string>& args);
  57   void interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  58   void interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args);
  59   void interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args);
  60   void interactive_run_proc(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  61   void interactive_run_proc_noisy(const std::string& cmd, const std::vector<std::string>& args);
  62   void interactive_run_proc_silent(const std::string& cmd, const std::vector<std::string>& args);
  63   void interactive_reg(const std::string& cmd, const std::vector<std::string>& args);
  64   void interactive_fregs(const std::string& cmd, const std::vector<std::string>& args);
  65   void interactive_fregd(const std::string& cmd, const std::vector<std::string>& args);
  66   void interactive_mem(const std::string& cmd, const std::vector<std::string>& args);
  67   void interactive_str(const std::string& cmd, const std::vector<std::string>& args);
  68   void interactive_until(const std::string& cmd, const std::vector<std::string>& args);
  69   reg_t get_reg(const std::vector<std::string>& args);
  70   reg_t get_freg(const std::vector<std::string>& args);
  71   reg_t get_mem(const std::vector<std::string>& args);
  72   reg_t get_pc(const std::vector<std::string>& args);
  73   reg_t get_tohost(const std::vector<std::string>& args);
  74
  75   friend class htif_t;
  76 };
  77
  78 #endif