config: Support read/write mode

This commit allow users specify required type of access in the config
file.  Users can specify what type of the access they want for each
access of each phase by adding one more field.  The filed can have value
of ro, wo, or rw for read only, write only, or read-write, respectively.

Signed-off-by: SeongJae Park <[email protected]>

Author: sjp38

masim.c

@@ -364,7 +364,7 @@ int parse_phase(char *lines[], int nr_lines, struct phase *p,
 	p->patterns = patterns;
 	for (j = 0; j < p->nr_patterns; j++) {
 		nr_fields = astr_split(lines[0], ',', &fields);
-		if (nr_fields != 4)
+		if (nr_fields != 4 && nr_fields != 5)
 			err(1, "Wrong number of fields! %s\n",
 					lines[0]);
 		a = &patterns[j];
@@ -380,6 +380,16 @@ int parse_phase(char *lines[], int nr_lines, struct phase *p,
 		a->random_access = atoi(fields[1]);
 		a->stride = atoi(fields[2]);
 		a->probability = atoi(fields[3]);
+		if (nr_fields == 5) {
+			if (!strncmp(fields[4], "ro", 2))
+				a->rw_mode = READ_ONLY;
+			else if (!strncmp(fields[4], "wo", 2))
+				a->rw_mode = WRITE_ONLY;
+			else if (!strncmp(fields[4], "rw", 2))
+				a->rw_mode = READ_WRITE;
+		} else {
+			a->rw_mode = WRITE_ONLY;
+		}
 		a->prob_start = p->total_probability;
 		a->last_offset = 0;
 		lines++;

masim.h

@@ -7,11 +7,18 @@ struct mregion {
 	char *region;
 };
 
+enum rw_mode {
+	READ_ONLY,
+	WRITE_ONLY,
+	READ_WRITE,
+};
+
 struct access {
 	struct mregion *mregion;
 	int random_access;
 	size_t stride;
 	int probability;
+	enum rw_mode rw_mode;
 
 	/* For runtime only */
 	int prob_start;