#include <vector>
#include <string>
#include "processor.h"
+#include "mmu.h"
-const int MEMSIZE = 0x7D000000;
+class htif_isasim_t;
+// this class encapsulates the processors and memory in a RISC-V machine.
class sim_t
{
public:
- sim_t(int _nprocs, size_t _memsz);
+ sim_t(int _nprocs, int mem_mb, const std::vector<std::string>& htif_args);
~sim_t();
- void load_elf(const char* fn);
+
+ // run the simulation to completion
void run(bool debug);
-private:
- processor_t* procs;
- int nprocs;
+ // deliver an IPI to a specific processor
+ void send_ipi(reg_t who);
- char* mem;
- size_t memsz;
+ // returns the number of processors in this simulator
+ size_t num_cores() { return procs.size(); }
+ processor_t* get_core(size_t i) { return procs[i]; }
- void step_all(size_t n, size_t interleave, bool noisy);
+ // read one of the system control registers
+ reg_t get_scr(int which);
- void interactive_quit(const std::vector<std::string>& args);
+private:
+ htif_isasim_t* htif;
- void interactive_run(const std::vector<std::string>& args, bool noisy);
- void interactive_run_noisy(const std::vector<std::string>& args);
- void interactive_run_silent(const std::vector<std::string>& args);
+ // main memory, shared between processors
+ char* mem;
+ size_t memsz; // memory size in bytes
+ mmu_t* mmu; // debug port into main memory
+
+ // processors
+ std::vector<processor_t*> procs;
- void interactive_run_proc(const std::vector<std::string>& args, bool noisy);
- void interactive_run_proc_noisy(const std::vector<std::string>& args);
- void interactive_run_proc_silent(const std::vector<std::string>& args);
+ // run each processor for n instructions; interleave instructions are
+ // run on a processor before moving on to the next processor.
+ // interleave must divide n.
+ // if noisy, print out the instructions as they execute.
+ void step_all(size_t n, size_t interleave, bool noisy);
- void interactive_reg(const std::vector<std::string>& args);
- void interactive_mem(const std::vector<std::string>& args);
- void interactive_until(const std::vector<std::string>& args);
+ // 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_run_proc(const std::string& cmd, const std::vector<std::string>& args, bool noisy);
+ void interactive_run_proc_noisy(const std::string& cmd, const std::vector<std::string>& args);
+ void interactive_run_proc_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;
};
#endif