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// See LICENSE for license details.
#ifndef _RISCV_SIM_H
#define _RISCV_SIM_H
#include "processor.h"
#include "devices.h"
#include "debug_module.h"
#include "simif.h"
#include <fesvr/htif.h>
#include <fesvr/context.h>
#include <vector>
#include <string>
#include <memory>
#include <sys/types.h>
class mmu_t;
class remote_bitbang_t;
// this class encapsulates the processors and memory in a RISC-V machine.
class sim_t : public htif_t, public simif_t
{
public:
sim_t(const char* isa, const char* varch, size_t _nprocs, bool halted,
reg_t start_pc, std::vector<std::pair<reg_t, mem_t*>> mems,
const std::vector<std::string>& args, const std::vector<int> hartids,
const debug_module_config_t &dm_config);
~sim_t();
// run the simulation to completion
int run();
void set_debug(bool value);
void set_log(bool value);
void set_histogram(bool value);
void set_procs_debug(bool value);
void set_dtb_enabled(bool value) {
this->dtb_enabled = value;
}
void set_remote_bitbang(remote_bitbang_t* remote_bitbang) {
this->remote_bitbang = remote_bitbang;
}
const char* get_dts() { if (dts.empty()) reset(); return dts.c_str(); }
processor_t* get_core(size_t i) { return procs.at(i); }
unsigned nprocs() const { return procs.size(); }
// Callback for processors to let the simulation know they were reset.
void proc_reset(unsigned id);
private:
std::vector<std::pair<reg_t, mem_t*>> mems;
mmu_t* debug_mmu; // debug port into main memory
std::vector<processor_t*> procs;
reg_t start_pc;
std::string dts;
std::unique_ptr<rom_device_t> boot_rom;
std::unique_ptr<clint_t> clint;
bus_t bus;
processor_t* get_core(const std::string& i);
void step(size_t n); // step through simulation
static const size_t INTERLEAVE = 5000;
static const size_t INSNS_PER_RTC_TICK = 100; // 10 MHz clock for 1 BIPS core
static const size_t CPU_HZ = 1000000000; // 1GHz CPU
size_t current_step;
size_t current_proc;
bool debug;
bool log;
bool histogram_enabled; // provide a histogram of PCs
bool dtb_enabled;
remote_bitbang_t* remote_bitbang;
// memory-mapped I/O routines
char* addr_to_mem(reg_t addr);
bool mmio_load(reg_t addr, size_t len, uint8_t* bytes);
bool mmio_store(reg_t addr, size_t len, const uint8_t* bytes);
void make_dtb();
// presents a prompt for introspection into the simulation
void interactive();
// functions that help implement interactive()
void interactive_help(const std::string& cmd, const std::vector<std::string>& args);
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_vreg(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_freg(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_pc(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, bool noisy);
void interactive_until_silent(const std::string& cmd, const std::vector<std::string>& args);
void interactive_until_noisy(const std::string& cmd, const std::vector<std::string>& args);
reg_t get_reg(const std::vector<std::string>& args);
freg_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);
friend class processor_t;
friend class mmu_t;
friend class debug_module_t;
// htif
friend void sim_thread_main(void*);
void main();
context_t* host;
context_t target;
void reset();
void idle();
void read_chunk(addr_t taddr, size_t len, void* dst);
void write_chunk(addr_t taddr, size_t len, const void* src);
size_t chunk_align() { return 8; }
size_t chunk_max_size() { return 8; }
public:
// Initialize this after procs, because in debug_module_t::reset() we
// enumerate processors, which segfaults if procs hasn't been initialized
// yet.
debug_module_t debug_module;
};
extern volatile bool ctrlc_pressed;
#endif
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