3 files changed, 68 insertions, 0 deletions
diff --git a/src/commonlib/Makefile.inc b/src/commonlib/Makefile.inc
index c5fa8ed85e..53975bcad8 100644
--- a/src/commonlib/Makefile.inc
+++ b/src/commonlib/Makefile.inc
@@ -53,3 +53,7 @@ ramstage-y += bsd/lz4_wrapper.c
 postcar-y += bsd/lz4_wrapper.c
 
 ramstage-y += sort.c
+
+romstage-y += bsd/elog.c
+ramstage-y += bsd/elog.c
+smm-y += bsd/elog.c
diff --git a/src/commonlib/bsd/elog.c b/src/commonlib/bsd/elog.c
new file mode 100644
index 0000000000..62149daa42
--- /dev/null
+++ b/src/commonlib/bsd/elog.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#include <commonlib/bsd/elog.h>
+#include <stddef.h>
+
+/*
+ * verify and validate if header is a valid coreboot Event Log header.
+ * return CB_ERR if invalid, otherwise CB_SUCCESS.
+ */
+enum cb_err elog_verify_header(const struct elog_header *header)
+{
+	if (header == NULL)
+		return CB_ERR;
+
+	if (header->magic != ELOG_SIGNATURE)
+		return CB_ERR;
+
+	if (header->version != ELOG_VERSION)
+		return CB_ERR;
+
+	if (header->header_size != sizeof(*header))
+		return CB_ERR;
+
+	return CB_SUCCESS;
+}
diff --git a/src/commonlib/bsd/include/commonlib/bsd/elog.h b/src/commonlib/bsd/include/commonlib/bsd/elog.h
new file mode 100644
index 0000000000..6c58557fbe
--- /dev/null
+++ b/src/commonlib/bsd/include/commonlib/bsd/elog.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifndef _COMMONLIB_BSD_ELOG_H_
+#define _COMMONLIB_BSD_ELOG_H_
+
+#include <inttypes.h>
+
+#include <commonlib/bsd/cb_err.h>
+
+/* ELOG header */
+struct elog_header {
+	uint32_t magic;
+	uint8_t version;
+	uint8_t header_size;
+	uint8_t reserved[2];
+} __packed;
+
+/* ELOG related constants */
+#define ELOG_SIGNATURE			0x474f4c45  /* 'ELOG' */
+#define ELOG_VERSION			1
+
+/* SMBIOS event log header */
+struct event_header {
+	uint8_t type;
+	uint8_t length;
+	uint8_t year;
+	uint8_t month;
+	uint8_t day;
+	uint8_t hour;
+	uint8_t minute;
+	uint8_t second;
+} __packed;
+
+/* SMBIOS Type 15 related constants */
+#define ELOG_HEADER_TYPE_OEM		0x88
+
+enum cb_err elog_verify_header(const struct elog_header *header);
+
+#endif /* _COMMONLIB_BSD_ELOG_H_ */