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Arguments clarification, add examples 

This clarifies and provides consistent for the command line arguments
usage text.

This adds a set of examples for running the rocket-chip emulator.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@gmail.com>
This commit is contained in:
Schuyler Eldridge 2017-11-18 19:20:44 -05:00 committed by Megan Wachs
parent 1aa87f6578
commit 7ae6bf7611
1 changed files with 28 additions and 17 deletions
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45
csrc/emulator.cc
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@ -47,29 +47,40 @@ Run a BINARY on the Rocket Chip emulator.\n\
Mandatory arguments to long options are mandatory for short options too.\n\
\n\
EMULATOR OPTIONS\n\
-c, --cycle-count Print the cycle count before exiting\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 (cycle-by-cycle info)\n\
+verbose\n\
", stdout);
#if VM_TRACE
#if VM_TRACE == 0
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\
\n\
EMULATOR OPTIONS (unsupported in non-debug build -- try `make debug`)\n\
", stdout);
EMULATOR OPTIONS (only supported in debug build -- try `make debug`)\n",
stdout);
#endif
fputs("\
VCD options (e.g., -v, +dump-start) require a debug-enabled emulator.\n\
Try `make debug`.\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\
", stdout);
fputs(HTIF_USAGE_OPTIONS, stdout);
fputs("\n" HTIF_USAGE_OPTIONS, stdout);
printf("\n"
"EXAMPLES\n"
" - run a bare metal test:\n"
" %s rv64ui-p-add\n"
" - run a bare metal test showing cycle-by-cycle information:\n"
" %s +verbose rv64ui-p-add 2>&1 | spike-dasm\n"
#if VM_TRACE
" - run a bare metal test to generate a VCD waveform:\n"
" %s -v rv64ui-p-add.vcd rv64ui-p-add\n"
#endif
" - run a hello-world test using the proxy kernel:\n"
" %s pk hello\n",
program_name, program_name, program_name, program_name);
}
int main(int argc, char** argv)
@ -139,7 +150,7 @@ int main(int argc, char** argv)
optarg = optarg+12;
}
#if VM_TRACE
else if (arg.substr(0, 12) == "+dump-start=")
else if (arg.substr(0, 12) == "+dump-start=") {
c = 'x';
optarg = optarg+12;
}
@ -148,7 +159,7 @@ int main(int argc, char** argv)
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.
// case, then we're done processing EMULATOR arguments.
else {
static struct option htif_long_options [] = { HTIF_LONG_OPTIONS };
struct option * htif_option = &htif_long_options[0];