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// See LICENSE for license details.
#ifndef _RISCV_SIM_H
#define _RISCV_SIM_H
#include <vector>
#include <string>
#include <memory>
#include "processor.h"
#include "mmu.h"
class htif_isasim_t;
// this class encapsulates the processors and memory in a RISC-V machine.
class sim_t
{
public:
sim_t(size_t _nprocs, size_t mem_mb, const std::vector<std::string>& htif_args);
~sim_t();
// run the simulation to completion
int run();
bool running();
void stop();
void set_debug(bool value);
void set_histogram(bool value);
void set_procs_debug(bool value);
htif_isasim_t* get_htif() { return htif.get(); }
// deliver an IPI to a specific processor
void send_ipi(reg_t who);
// returns the number of processors in this simulator
size_t num_cores() { return procs.size(); }
processor_t* get_core(size_t i) { return procs.at(i); }
// read one of the system control registers
reg_t get_scr(int which);
private:
std::unique_ptr<htif_isasim_t> htif;
char* mem; // main memory
size_t memsz; // memory size in bytes
mmu_t* debug_mmu; // debug port into main memory
std::vector<processor_t*> procs;
void step(size_t n); // step through simulation
static const size_t INTERLEAVE = 5000;
size_t current_step;
size_t current_proc;
bool debug;
bool histogram_enabled; // provide a histogram of PCs
// presents a prompt for introspection into the simulation
void interactive();
// functions that help implement interactive()
void interactive_quit(const std::string& cmd, const std::vector<std::string>& args);
void interactive_run(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
void interactive_run_noisy(const std::string& cmd, const std::vector<std::string>& args);
void interactive_run_silent(const std::string& cmd, const std::vector<std::string>& args);
void interactive_reg(const std::string& cmd, const std::vector<std::string>& args);
void interactive_fregs(const std::string& cmd, const std::vector<std::string>& args);
void interactive_fregd(const std::string& cmd, const std::vector<std::string>& args);
void interactive_mem(const std::string& cmd, const std::vector<std::string>& args);
void interactive_str(const std::string& cmd, const std::vector<std::string>& args);
void interactive_until(const std::string& cmd, const std::vector<std::string>& args);
reg_t get_reg(const std::vector<std::string>& args);
reg_t get_freg(const std::vector<std::string>& args);
reg_t get_mem(const std::vector<std::string>& args);
reg_t get_pc(const std::vector<std::string>& args);
reg_t get_tohost(const std::vector<std::string>& args);
friend class htif_isasim_t;
};
extern volatile bool ctrlc_pressed;
#endif
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