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   // communicate with the host machine
  22   void set_tohost(reg_t val);
  23   reg_t get_fromhost();
  24
  25   // deliver an IPI to a specific processor
  26   void send_ipi(reg_t who);
  27
  28   // returns the number of processors in this simulator
  29   size_t num_cores() { return procs.size(); }
  30
  31 private:
  32   htif_t* htif;
  33
  34   // global registers for communication with host machine
  35   reg_t tohost;
  36   reg_t fromhost;
  37
  38   // main memory, shared between processors
  39   char* mem;
  40   size_t memsz; // memory size in bytes
  41   mmu_t* mmu; // debug port into main memory
  42
  43   // processors
  44   std::vector<processor_t*> procs;
  45
  46   // terminate the simulation loop after the current iteration
  47   void stop() { running = false; }
  48   bool running;
  49
  50   // run each processor for n instructions; interleave instructions are
  51   // run on a processor before moving on to the next processor.
  52   // interleave must divide n.
  53   // if noisy, print out the instructions as they execute.
  54   void step_all(size_t n, size_t interleave, bool noisy);
  55
  56   // presents a prompt for introspection into the simulation
  57   void interactive();
  58
  59   // functions that help implement interactive()
  60   void interactive_quit(const std::string& cmd, const std::vector<std::string>& args);
  61   void interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  62   void interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args);
  63   void interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args);
  64   void interactive_run_proc(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  65   void interactive_run_proc_noisy(const std::string& cmd, const std::vector<std::string>& args);
  66   void interactive_run_proc_silent(const std::string& cmd, const std::vector<std::string>& args);
  67   void interactive_reg(const std::string& cmd, const std::vector<std::string>& args);
  68   void interactive_fregs(const std::string& cmd, const std::vector<std::string>& args);
  69   void interactive_fregd(const std::string& cmd, const std::vector<std::string>& args);
  70   void interactive_mem(const std::string& cmd, const std::vector<std::string>& args);
  71   void interactive_str(const std::string& cmd, const std::vector<std::string>& args);
  72   void interactive_until(const std::string& cmd, const std::vector<std::string>& args);
  73   reg_t get_reg(const std::vector<std::string>& args);
  74   reg_t get_freg(const std::vector<std::string>& args);
  75   reg_t get_mem(const std::vector<std::string>& args);
  76   reg_t get_pc(const std::vector<std::string>& args);
  77   reg_t get_tohost(const std::vector<std::string>& args);
  78
  79   friend class htif_t;
  80 };
  81
  82 #endif