target/riscv: avoid unnecessary IR scans

en-sc · en-sc · commit a96a0a4e3993 · 2024-09-06T16:12:39.000+03:00
Change-Id: I03feb5c7d72d5aa38f2cc13c4ed30175cffde84a
Signed-off-by: Evgeniy Naydanov &lt;evgeniy.naydanov@syntacore.com&gt;
diff --git a/src/target/riscv/riscv-013.c b/src/target/riscv/riscv-013.c
@@ -435,6 +435,9 @@ static void select_dmi(struct target *target)
 		select_dmi_via_bscan(target);
 		return;
 	}
+	if (buf_cmp(target->tap->cur_instr, select_dbus.out_value,
+				target->tap->ir_length) == 0)
+		return;
 	jtag_add_ir_scan(target->tap, &select_dbus, TAP_IDLE);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -435,6 +435,9 @@ static void select_dmi(struct target *target)`
`435`	`435`	`select_dmi_via_bscan(target);`
`436`	`436`	`return;`
`437`	`437`	`}`
	`438`	`+ if (buf_cmp(target->tap->cur_instr, select_dbus.out_value,`
	`439`	`+ target->tap->ir_length) == 0)`
	`440`	`+ return;`
`438`	`441`	`jtag_add_ir_scan(target->tap, &select_dbus, TAP_IDLE);`
`439`	`442`	`}`
`440`	`443`