litex/build/sim/core/veril.cpp

   1 /* Copyright (C) 2017 LambdaConcept */
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <stdint.h>
   7 #include "Vsim.h"
   8 #include "verilated.h"
   9 #ifdef TRACE_FST
  10 #include "verilated_fst_c.h"
  11 #else
  12 #include "verilated_vcd_c.h"
  13 #endif
  14
  15 #ifdef TRACE_FST
  16 VerilatedFstC* tfp;
  17 #else
  18 VerilatedVcdC* tfp;
  19 #endif
  20 uint64_t tfp_start;
  21 uint64_t tfp_end;
  22 uint64_t main_time = 0;
  23
  24 extern "C" void litex_sim_eval(void *vsim)
  25 {
  26   Vsim *sim = (Vsim*)vsim;
  27   sim->eval();
  28 }
  29
  30 extern "C" void litex_sim_increment_time(unsigned long dt_ps) {
  31     main_time += dt_ps;
  32 }
  33
  34 extern "C" void litex_sim_init_cmdargs(int argc, char *argv[])
  35 {
  36   Verilated::commandArgs(argc, argv);
  37 }
  38
  39 extern "C" void litex_sim_init_tracer(void *vsim, long start, long end)
  40 {
  41   Vsim *sim = (Vsim*)vsim;
  42   tfp_start = start;
  43   tfp_end = end >= 0 ? end : UINT64_MAX;
  44   Verilated::traceEverOn(true);
  45 #ifdef TRACE_FST
  46       tfp = new VerilatedFstC;
  47       sim->trace(tfp, 99);
  48       tfp->open("sim.fst");
  49 #else
  50       tfp = new VerilatedVcdC;
  51       sim->trace(tfp, 99);
  52       tfp->open("sim.vcd");
  53 #endif
  54   tfp->set_time_unit("1ps");
  55   tfp->set_time_resolution("1ps");
  56 }
  57
  58 extern "C" void litex_sim_tracer_dump()
  59 {
  60   if (tfp_start <= main_time && main_time <= tfp_end) {
  61     tfp->dump(main_time);
  62   }
  63 }
  64
  65 extern "C" int litex_sim_got_finish()
  66 {
  67   return Verilated::gotFinish();
  68 }
  69
  70 #if VM_COVERAGE
  71 extern "C" void litex_sim_coverage_dump()
  72 {
  73   VerilatedCov::write("sim.cov");
  74 }
  75 #endif
  76
  77 double sc_time_stamp()
  78 {
  79   return main_time;
  80 }