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diff --git a/src/ec/google/chromeec/smm.h b/src/ec/google/chromeec/smm.h
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+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 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.
+ */
+
+#ifndef _EC_GOOGLE_CHROMEEC_SMM_H
+#define _EC_GOOGLE_CHROMEEC_SMM_H
+
+#include <stdint.h>
+
+/* Process all events from the EC when EC triggered an SMI#. */
+void chromeec_smi_process_events(void);
+
+/*
+ * Set wake masks according to sleep type, clear SCI and SMI masks,
+ * and clear any pending events.
+ */
+void chromeec_smi_sleep(int slp_type, uint32_t s3_mask, uint32_t s5_mask);
+
+/*
+ * Provided the APMC command do the following while clearing pending events.
+ * APM_CNT_ACPI_ENABLE: clear SMI mask. set SCI mask.
+ * APM_CNT_ACPI_DISABLE: clear SCI mask. set SMI mask.
+ */
+void chromeec_smi_apmc(int apmc, uint32_t sci_mask, uint32_t smi_mask);
+
+#endif /* _EC_GOOGLE_CHROMEEC_SMM_H */