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 "processor.h"
   9 #include "mmu.h"
  10
  11 class htif_isasim_t;
  12
  13 // this class encapsulates the processors and memory in a RISC-V machine.
  14 class sim_t
  15 {
  16 public:
  17   sim_t(int _nprocs, int mem_mb, const std::vector<std::string>& htif_args);
  18   ~sim_t();
  19
  20   // run the simulation to completion
  21   void run(bool debug);
  22
  23   // deliver an IPI to a specific processor
  24   void send_ipi(reg_t who);
  25
  26   // returns the number of processors in this simulator
  27   size_t num_cores() { return procs.size(); }
  28   processor_t* get_core(size_t i) { return procs[i]; }
  29
  30   // read one of the system control registers
  31   reg_t get_scr(int which);
  32
  33 private:
  34   htif_isasim_t* htif;
  35   char* mem; // main memory
  36   size_t memsz; // memory size in bytes
  37   mmu_t* mmu; // debug port into main memory
  38   std::vector<processor_t*> procs;
  39
  40   void step(size_t n, bool noisy); // step through simulation
  41   static const size_t INTERLEAVE = 5000;
  42   size_t current_step;
  43   size_t current_proc;
  44
  45   // presents a prompt for introspection into the simulation
  46   void interactive();
  47
  48   // functions that help implement interactive()
  49   void interactive_quit(const std::string& cmd, const std::vector<std::string>& args);
  50   void interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  51   void interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args);
  52   void interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args);
  53   void interactive_run_proc(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
  54   void interactive_run_proc_noisy(const std::string& cmd, const std::vector<std::string>& args);
  55   void interactive_run_proc_silent(const std::string& cmd, const std::vector<std::string>& args);
  56   void interactive_reg(const std::string& cmd, const std::vector<std::string>& args);
  57   void interactive_fregs(const std::string& cmd, const std::vector<std::string>& args);
  58   void interactive_fregd(const std::string& cmd, const std::vector<std::string>& args);
  59   void interactive_mem(const std::string& cmd, const std::vector<std::string>& args);
  60   void interactive_str(const std::string& cmd, const std::vector<std::string>& args);
  61   void interactive_until(const std::string& cmd, const std::vector<std::string>& args);
  62   reg_t get_reg(const std::vector<std::string>& args);
  63   reg_t get_freg(const std::vector<std::string>& args);
  64   reg_t get_mem(const std::vector<std::string>& args);
  65   reg_t get_pc(const std::vector<std::string>& args);
  66   reg_t get_tohost(const std::vector<std::string>& args);
  67
  68   friend class htif_isasim_t;
  69 };
  70
  71 #endif