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rocket-chip/csrc/emulator.cc

229 lines
5.9 KiB
C++

// See LICENSE.SiFive for license details.
// See LICENSE.Berkeley for license details.
#include "verilated.h"
#if VM_TRACE
#include "verilated_vcd_c.h"
#endif
#include <fesvr/dtm.h>
#include <iostream>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
extern dtm_t* dtm;
static uint64_t trace_count = 0;
bool verbose;
bool done_reset;
void handle_sigterm(int sig)
{
dtm->stop();
}
double sc_time_stamp()
{
return trace_count;
}
extern "C" int vpi_get_vlog_info(void* arg)
{
return 0;
}
static void usage(const char * program_name) {
printf("Usage: %s [OPTION]... BINARY [BINARY ARGS]\n", program_name);
fputs("\
Run a BINARY on the Rocket Chip emulator.\n\
\n\
Mandatory arguments to long options are mandatory for short options too.\n\
-c, --cycle-count print the cycle count before exiting\n\
+cycle-count\n\
-h, --help display this help and exit\n\
-m, --max-cycles=CYCLES kill the emulation after CYCLES\n\
+max-cycles=CYCLES\n\
-s, --seed=SEED use random number seed SEED\n\
-V, --verbose enable all Chisel printfs\n\
+verbose\n\
", stdout);
#if VM_TRACE
fputs("\
-v, --vcd=FILE, write vcd trace to FILE (or '-' for stdout)\n\
-x, --dump-start=CYCLE start VCD tracing at CYCLE\n\
+dump-start\n\
", stdout);
#else
fputs("\
VCD options (e.g., -v, +dump-start) require a debug-enabled emulator.\n\
Try `make debug`.\n\
", stdout);
#endif
}
int main(int argc, char** argv)
{
unsigned random_seed = (unsigned)time(NULL) ^ (unsigned)getpid();
uint64_t max_cycles = -1;
int ret = 0;
bool print_cycles = false;
#if VM_TRACE
FILE * vcdfile = NULL;
uint64_t start = 0;
#endif
std::vector<std::string> to_dtm;
while (1) {
static struct option long_options[] = {
{"cycle-count", no_argument, 0, 'c' },
{"help", no_argument, 0, 'h' },
{"max-cycles", required_argument, 0, 'm' },
{"seed", required_argument, 0, 's' },
{"verbose", no_argument, 0, 'V' },
#if VM_TRACE
{"vcd", required_argument, 0, 'v' },
{"dump-start", required_argument, 0, 'x' },
#endif
{0, 0, 0, 0}
};
int option_index = 0;
#if VM_TRACE
int c = getopt_long(argc, argv, "-chm:s:v:Vx:", long_options, &option_index);
#else
int c = getopt_long(argc, argv, "-chm:s:V", long_options, &option_index);
#endif
if (c == -1) break;
switch (c) {
// Process "normal" options with '--' long options or '-' short options
case '?': usage(argv[0]); return 1;
case 'c': print_cycles = true; break;
case 'h': usage(argv[0]); return 0;
case 'm': max_cycles = atoll(optarg); break;
case 's': random_seed = atoi(optarg); break;
case 'V': verbose = true; break;
#if VM_TRACE
case 'v': {
vcdfile = strcmp(optarg, "-") == 0 ? stdout : fopen(optarg, "w");
if (!vcdfile) {
std::cerr << "Unable to open " << optarg << " for VCD write\n";
return 1;
}
break;
}
case 'x': start = atoll(optarg); break;
#endif
// Processing of legacy '+' options and recognition of when
// we've hit the binary. The binary is expected to be a
// non-option and not start with '-' or '+'.
case 1: {
std::string arg = optarg;
if (arg == "+verbose")
verbose = true;
else if (arg.substr(0, 12) == "+max-cycles=")
max_cycles = atoll(optarg+12);
#if VM_TRACE
else if (arg.substr(0, 12) == "+dump-start=")
start = atoll(optarg+12);
#endif
else if (arg.substr(0, 12) == "+cycle-count")
print_cycles = true;
else {
to_dtm.push_back(optarg);
goto done_processing;
}
break;
}
}
}
done_processing:
if (optind < argc)
while (optind < argc)
to_dtm.push_back(argv[optind++]);
if (!to_dtm.size()) {
std::cerr << "No binary specified for emulator\n";
usage(argv[0]);
return 1;
}
if (verbose)
fprintf(stderr, "using random seed %u\n", random_seed);
srand(random_seed);
srand48(random_seed);
Verilated::randReset(2);
TEST_HARNESS *tile = new TEST_HARNESS;
#if VM_TRACE
Verilated::traceEverOn(true); // Verilator must compute traced signals
std::unique_ptr<VerilatedVcdFILE> vcdfd(new VerilatedVcdFILE(vcdfile));
std::unique_ptr<VerilatedVcdC> tfp(new VerilatedVcdC(vcdfd.get()));
if (vcdfile) {
tile->trace(tfp.get(), 99); // Trace 99 levels of hierarchy
tfp->open("");
}
#endif
dtm = new dtm_t(to_dtm);
signal(SIGTERM, handle_sigterm);
// reset for several cycles to handle pipelined reset
for (int i = 0; i < 10; i++) {
tile->reset = 1;
tile->clock = 0;
tile->eval();
tile->clock = 1;
tile->eval();
tile->reset = 0;
}
done_reset = true;
while (!dtm->done() && !tile->io_success && trace_count < max_cycles) {
tile->clock = 0;
tile->eval();
#if VM_TRACE
bool dump = tfp && trace_count >= start;
if (dump)
tfp->dump(static_cast<vluint64_t>(trace_count * 2));
#endif
tile->clock = 1;
tile->eval();
#if VM_TRACE
if (dump)
tfp->dump(static_cast<vluint64_t>(trace_count * 2 + 1));
#endif
trace_count++;
}
#if VM_TRACE
if (tfp)
tfp->close();
if (vcdfile)
fclose(vcdfile);
#endif
if (dtm->exit_code())
{
fprintf(stderr, "*** FAILED *** (code = %d, seed %d) after %ld cycles\n", dtm->exit_code(), random_seed, trace_count);
ret = dtm->exit_code();
}
else if (trace_count == max_cycles)
{
fprintf(stderr, "*** FAILED *** (timeout, seed %d) after %ld cycles\n", random_seed, trace_count);
ret = 2;
}
else if (verbose || print_cycles)
{
fprintf(stderr, "Completed after %ld cycles\n", trace_count);
}
if (dtm) delete dtm;
if (tile) delete tile;
return ret;
}