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" uint64_t litex_sim_increment_time(unsigned long dt_ps) {
  31     main_time += dt_ps;
  32     return main_time;
  33 }
  34
  35 extern "C" void litex_sim_init_cmdargs(int argc, char *argv[])
  36 {
  37   Verilated::commandArgs(argc, argv);
  38 }
  39
  40 extern "C" void litex_sim_init_tracer(void *vsim, long start, long end)
  41 {
  42   Vsim *sim = (Vsim*)vsim;
  43   tfp_start = start;
  44   tfp_end = end >= 0 ? end : UINT64_MAX;
  45   Verilated::traceEverOn(true);
  46 #ifdef TRACE_FST
  47       tfp = new VerilatedFstC;
  48       sim->trace(tfp, 99);
  49       tfp->open("sim.fst");
  50 #else
  51       tfp = new VerilatedVcdC;
  52       sim->trace(tfp, 99);
  53       tfp->open("sim.vcd");
  54 #endif
  55   tfp->set_time_unit("1ps");
  56   tfp->set_time_resolution("1ps");
  57 }
  58
  59 extern "C" void litex_sim_tracer_dump()
  60 {
  61   if (tfp_start <= main_time && main_time <= tfp_end) {
  62     tfp->dump(main_time);
  63   }
  64 }
  65
  66 extern "C" int litex_sim_got_finish()
  67 {
  68   return Verilated::gotFinish();
  69 }
  70
  71 #if VM_COVERAGE
  72 extern "C" void litex_sim_coverage_dump()
  73 {
  74   VerilatedCov::write("sim.cov");
  75 }
  76 #endif
  77
  78 double sc_time_stamp()
  79 {
  80   return main_time;
  81 }