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Make emulator.cc understand HTIF arguments 

This, with riscv-fesvr modifications, enables the rocket-chip emulator
to understand (and error out) if a command line argument that will
eventually be consumed by HTIF looks bad and can error out quickly.
This relies on modifications to risc-fesvr to support getopt and the
exposure of what HTIF arguments exist via the `htif.h` header.
This commit is contained in:
Schuyler Eldridge 2017-03-20 00:16:18 -04:00 committed by Megan Wachs
parent 3ead9a5d2d
commit 1aa87f6578
1 changed files with 72 additions and 37 deletions
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109
csrc/emulator.cc
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@ -37,33 +37,39 @@ 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);
static void usage(const char * program_name)
{
printf("Usage: %s [EMULATOR OPTION]... [HOST OPTION]... BINARY [TARGET OPTION]...\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\
\n\
EMULATOR OPTIONS\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\
-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\
-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\
\n\
EMULATOR OPTIONS (unsupported in non-debug build -- try `make debug`)\n\
", stdout);
#else
#endif
fputs("\
VCD options (e.g., -v, +dump-start) require a debug-enabled emulator.\n\
Try `make debug`.\n\
", stdout);
#endif
fputs(HTIF_USAGE_OPTIONS, stdout);
}
int main(int argc, char** argv)
@ -76,8 +82,8 @@ int main(int argc, char** argv)
FILE * vcdfile = NULL;
uint64_t start = 0;
#endif
char ** htif_argv = NULL;
std::vector<std::string> to_dtm;
while (1) {
static struct option long_options[] = {
{"cycle-count", no_argument, 0, 'c' },
@ -89,7 +95,7 @@ int main(int argc, char** argv)
{"vcd", required_argument, 0, 'v' },
{"dump-start", required_argument, 0, 'x' },
#endif
{0, 0, 0, 0}
HTIF_LONG_OPTIONS
};
int option_index = 0;
#if VM_TRACE
@ -98,8 +104,9 @@ int main(int argc, char** argv)
int c = getopt_long(argc, argv, "-chm:s:V", long_options, &option_index);
#endif
if (c == -1) break;
retry:
switch (c) {
// Process "normal" options with '--' long options or '-' short options
// Process long and short EMULATOR options
case '?': usage(argv[0]); return 1;
case 'c': print_cycles = true; break;
case 'h': usage(argv[0]); return 0;
@ -117,39 +124,67 @@ int main(int argc, char** argv)
}
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 '+'.
// Process legacy '+' EMULATOR arguments by replacing them with
// their getopt equivalents
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);
if (arg.substr(0, 1) != "+") {
optind--;
goto done_processing;
}
break;
if (arg == "+verbose")
c = 'V';
else if (arg.substr(0, 12) == "+max-cycles=") {
c = 'm';
optarg = optarg+12;
}
#if VM_TRACE
else if (arg.substr(0, 12) == "+dump-start=")
c = 'x';
optarg = optarg+12;
}
#endif
else if (arg.substr(0, 12) == "+cycle-count")
c = 'c';
// If we don't find a legacy '+' argument, it still could be
// an HTIF (HOST) argument and not an error. If this is the
// case, then we're doing processing EMULATOR arguments.
else {
static struct option htif_long_options [] = { HTIF_LONG_OPTIONS };
struct option * htif_option = &htif_long_options[0];
while (htif_option->name) {
if (arg.substr(1, strlen(htif_option->name)) == htif_option->name) {
optind--;
goto done_processing;
}
htif_option++;
}
std::cerr << argv[0] << ": invalid HTIF legacy plus-arg \"" << arg << "\"\n";
c = '?';
}
goto retry;
}
// Realize that we've hit HTIF (HOST) arguments or error out
default:
if (c >= HTIF_LONG_OPTIONS_OPTIND) {
optind--;
goto done_processing;
}
c = '?';
goto retry;
}
}
done_processing:
if (optind < argc)
while (optind < argc)
to_dtm.push_back(argv[optind++]);
if (!to_dtm.size()) {
if (optind == argc) {
std::cerr << "No binary specified for emulator\n";
usage(argv[0]);
return 1;
}
int htif_argc = 1 + argc - optind;
htif_argv = (char **) malloc((htif_argc) * sizeof (char *));
htif_argv[0] = argv[0];
for (int i = 1; optind < argc;) htif_argv[i++] = argv[optind++];
if (verbose)
fprintf(stderr, "using random seed %u\n", random_seed);
@ -171,9 +206,8 @@ done_processing:
}
#endif
dtm = new dtm_t(to_dtm);
//TODO: Specify port.
jtag = new remote_bitbang_t(0);
dtm = new dtm_t(htif_argc, htif_argv);
signal(SIGTERM, handle_sigterm);
@ -248,5 +282,6 @@ done_processing:
if (dtm) delete dtm;
if (jtag) delete jtag;
if (tile) delete tile;
if (htif_argv) free(htif_argv);
return ret;
}