1 files changed, 48 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..0947d19d63
--- /dev/null
+++ b/src/soc/samsung/exynos5420/timer.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2013 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 <arch/io.h>
+#include <soc/clk.h>
+#include <stdint.h>
+#include <timer.h>
+
+static const uint32_t clocks_per_usec = MCT_HZ/1000000;
+
+uint64_t mct_raw_value(void)
+{
+	uint64_t upper = readl(&exynos_mct->g_cnt_u);
+	uint64_t lower = readl(&exynos_mct->g_cnt_l);
+
+	return (upper << 32) | lower;
+}
+
+void mct_start(void)
+{
+	writel(readl(&exynos_mct->g_tcon) | (0x1 << 8),
+		&exynos_mct->g_tcon);
+}
+
+void timer_monotonic_get(struct mono_time *mt)
+{
+	/* We don't have to call mct_start() here
+	 * because it was already called in the bootblock
+	 */
+
+	mono_time_set_usecs(mt, mct_raw_value() / clocks_per_usec);
+}