microwatt-verilator.cpp: Added -h and -d flags.

Help string is crude, but at least shows all options.
Dump flag for enabling trace dumping. TRIGGER_ENABLE define was preventing dumping.
Trace dumps generate large VCD files, so may be worth using fst instead.

diff --git a/verilator/microwatt-verilator.cpp b/verilator/microwatt-verilator.cpp
index a226393f6ba74d5e3e1ffdb729d731d2311d53ad..5c7a82e7d607fc1a454e4fdd99d9c657616703f1 100644 (file)
--- a/verilator/microwatt-verilator.cpp
+++ b/verilator/microwatt-verilator.cpp
@@ -128,7 +128,7 @@ static void mem_write(unsigned char *mem,
 #define BRAM_DEBUG
 
 // sigh yes, all these should be runtime commandline options
-#define TRIGGER_ENABLE
+//#define TRIGGER_ENABLE
 #define TRIGGER_OCCURENCES 1
 #define TRIGGER_COUNTDOWN 20000
 //#define TERMINATE_AT_COUNTDOWN
@@ -179,6 +179,7 @@ int main(int argc, char **argv)
     memset(_mem, sz, 0);
     vluint64_t restore_time = 0;
 
+       bool traceme = false; // true: dump to trace file, false: don't
     // identify bram files to load (if not starting "+[verilator]")
     // here we can specify any number of files, but at present only
     // (realistically) two are supported: the bootloader (at address 0x0)
@@ -187,7 +188,20 @@ int main(int argc, char **argv)
     // of hassle
     for (int i = 1; i < argc; i++) {
         char *bram_file = NULL;
-        if (strcmp("-s", argv[i]) == 0) {
+               if (strcmp("-h", argv[i]) == 0) {
+            printf("---Microwatt-verilator binary.---\n");
+                       printf("Line args:\n");
+                       printf("-h <- shows this help string\n");
+                       printf("-s [NUMBER] <- start sim from snapshot\n");
+                       printf("first arg <- binary file to load into bram\n");
+                       printf("second arg <- linux binary to load to 0x600000 (a hack)\n");
+                       exit(1);
+        }
+               else if (strcmp("-d", argv[i]) == 0) {
+            printf("Trace dump enabled. NOTE: Generates *LARGE* files!\n");
+                       traceme = true;
+        }
+        else if (strcmp("-s", argv[i]) == 0) {
             bram_file = (char*)malloc(128); // okok not freed, i know
             restore_time = atol(argv[i+1]); // yees, we knoow, check argc
             restore_model(restore_time, top);
@@ -267,7 +281,6 @@ int main(int argc, char **argv)
     unsigned long long bram_do = 0;
 
     // trace conditions
-    bool traceme = true;
     int trigger_occurrences = TRIGGER_OCCURENCES;
 #ifdef TRIGGER_COUNTDOWN
     int trigger_countdown = TRIGGER_COUNTDOWN;