+/* Avoid needless I/O ... leave breakpoints and watchpoints alone
+ * unless they're removed, or need updating because of single-stepping
+ * or running debugger code.
+ */
+static int dpm_maybe_update_bpwp(struct arm_dpm *dpm, bool bpwp,
+ struct dpm_bpwp *xp, int *set_p)
+{
+ int retval = ERROR_OK;
+ bool disable;
+
+ if (!set_p) {
+ if (!xp->dirty)
+ goto done;
+ xp->dirty = false;
+ /* removed or startup; we must disable it */
+ disable = true;
+ } else if (bpwp) {
+ if (!xp->dirty)
+ goto done;
+ /* disabled, but we must set it */
+ xp->dirty = disable = false;
+ *set_p = true;
+ } else {
+ if (!*set_p)
+ goto done;
+ /* set, but we must temporarily disable it */
+ xp->dirty = disable = true;
+ *set_p = false;
+ }
+
+ if (disable)
+ retval = dpm->bpwp_disable(dpm, xp->number);
+ else
+ retval = dpm->bpwp_enable(dpm, xp->number,
+ xp->address, xp->control);
+
+ if (retval != ERROR_OK)
+ LOG_ERROR("%s: can't %s HW bp/wp %d",
+ disable ? "disable" : "enable",
+ target_name(dpm->arm->target),
+ xp->number);
+done:
+ return retval;
+}
+