1 files changed, 56 insertions, 0 deletions
diff --git a/src/soc/samsung/exynos5420/timer.c b/src/soc/samsung/exynos5420/timer.c
new file mode 100644
index 0000000000..ae13342c92
--- /dev/null
+++ b/src/soc/samsung/exynos5420/timer.c
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2009 Samsung Electronics
+ *
+ * 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>
+#include "clk.h"
+
+void init_timer(void)
+{
+	/* Nothing to do because we manually
+	 * call mct_start() in the bootblock
+	 */
+}
+
+/* delay x useconds */
+void udelay(unsigned usec)
+{
+	struct mono_time current, end;
+
+	if (!thread_yield_microseconds(usec))
+		return;
+
+	timer_monotonic_get(&current);
+	end = current;
+	mono_time_add_usecs(&end, usec);
+
+	if (mono_time_after(&current, &end)) {
+		printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n",
+				usec);
+		/* There's not much we can do if usec is too big. Use a long,
+		 * paranoid delay value and hope for the best... */
+		end = current;
+		mono_time_add_usecs(&end, USECS_PER_SEC);
+	}
+
+	while (mono_time_before(&current, &end))
+		timer_monotonic_get(&current);
+}