1 files changed, 42 insertions, 0 deletions
diff --git a/src/lib/timer.c b/src/lib/timer.c
new file mode 100644
index 0000000000..a2edc5c96d
--- /dev/null
+++ b/src/lib/timer.c
@@ -0,0 +1,42 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <timer.h>
+#include <delay.h>
+#include <thread.h>
+
+void udelay(unsigned usec)
+{
+	struct stopwatch sw;
+
+	/*
+	 * As the timer granularity is in microseconds pad the
+	 * requested delay by one to get at least >= requested usec delay.
+	 */
+	usec += 1;
+
+	if (!thread_yield_microseconds(usec))
+		return;
+
+	stopwatch_init_usecs_expire(&sw, usec);
+
+	while (!stopwatch_expired(&sw))
+		;
+}