X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=riscv%2Fsim.h;h=6c6e4350702d62b240a42730a20f0b3efbd8f901;hb=aa8cbb1ccd3856fd5e0437b0e24cfd7a3b794b8e;hp=6d2ac9be43aa46ea5724bc4b357267e7a12f694d;hpb=01c01cc36f006cfb03cd6d1c5a68f926b93f7787;p=riscv-isa-sim.git

diff --git a/riscv/sim.h b/riscv/sim.h
index 6d2ac9b..6c6e435 100644
--- a/riscv/sim.h
+++ b/riscv/sim.h
@@ -1,46 +1,117 @@
+// See LICENSE for license details.
+
 #ifndef _RISCV_SIM_H
 #define _RISCV_SIM_H
 
+#include "processor.h"
+#include "devices.h"
+#include "debug_module.h"
+#include <fesvr/htif.h>
+#include <fesvr/context.h>
 #include <vector>
 #include <string>
-#include "processor.h"
+#include <memory>
 
-const int MEMSIZE = 0x7D000000;
+class mmu_t;
+class remote_bitbang_t;
 
-class sim_t
+// this class encapsulates the processors and memory in a RISC-V machine.
+class sim_t : public htif_t
 {
 public:
-  sim_t(int _nprocs, size_t _memsz);
+  sim_t(const char* isa, 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,
+        unsigned progsize, unsigned max_bus_master_bits, bool require_authentication);
   ~sim_t();
-  void load_elf(const char* fn);
-  void run(bool debug);
 
-private:
-  processor_t* procs;
-  int nprocs;
+  // 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_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(); }
 
-  char* mem;
-  size_t memsz;
-
-  void step_all(size_t n, size_t interleave, bool noisy);
-
-  void interactive_quit(const std::vector<std::string>& args);
+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;
 
-  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);
+  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
+  remote_bitbang_t* remote_bitbang;
 
-  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);
+  // 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();
 
-  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_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_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);
   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