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