rocket-chip/csrc/htif_emulator.h

// See LICENSE for license details.

#ifndef _HTIF_EMULATOR_H
#define _HTIF_EMULATOR_H

#include <fesvr/htif_pthread.h>

class htif_emulator_t : public htif_pthread_t
{
 int memory_channel_mux_select;

 public:
  htif_emulator_t(const std::vector<std::string>& args)
    : htif_pthread_t(args),
      memory_channel_mux_select(0)
  {
    for (const auto& arg: args) {
      if (!strncmp(arg.c_str(), "+memory_channel_mux_select=", 27))
        memory_channel_mux_select = atoi(arg.c_str()+27);
    }
 }

  void set_clock_divisor(int divisor, int hold_cycles)
  {
#ifdef UNCORE_SCR__HTIF_IO_CLOCK_DIVISOR__OFFSET
    /* We only want to write the HTIF clock divisor SCR on targets where it
     * actually exists (there isn't one on the FPGA, for example). */
    write_cr(-1, UNCORE_SCR__HTIF_IO_CLOCK_DIVISOR__OFFSET, divisor | hold_cycles << 16);
#endif
  }

  void start()
  {
    set_clock_divisor(5, 2);
    htif_pthread_t::start();
  }
};

#endif