2 files changed, 50 insertions, 1 deletions
diff --git a/src/include/dimm_info_util.h b/src/include/dimm_info_util.h
new file mode 100644
index 0000000000..27d278bd16
--- /dev/null
+++ b/src/include/dimm_info_util.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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 _DIMM_INFO_UTIL_H_
+#define _DIMM_INFO_UTIL_H_
+
+#include <smbios.h>
+#include <stdint.h>
+
+/**
+ * Convert the SMBIOS bit widths into an SPD encoded width.
+ *
+ * Use this when setting dimm_info.bus_width if the raw SPD values are not
+ * available.
+ */
+uint8_t smbios_bus_width_to_spd_width(uint16_t total_width,
+				      uint16_t data_width);
+
+/**
+ * Convert the SMBIOS size values into the total number of MiB.
+ *
+ * Use this when setting dimm_info.dimm_size.
+ */
+uint32_t smbios_memory_size_to_mib(uint16_t memory_size,
+				   uint32_t extended_size);
+
+/**
+ * Convert the SMBIOS form factor to the SPD module type.
+ *
+ * Use this when setting dimm_info.mod_type.
+ */
+uint8_t
+smbios_form_factor_to_spd_mod_type(smbios_memory_form_factor form_factor);
+
+#endif
diff --git a/src/include/spd.h b/src/include/spd.h
index 9ada5c3c6d..e9c23f2652 100644
--- a/src/include/spd.h
+++ b/src/include/spd.h
@@ -289,7 +289,7 @@ enum spd_memory_type {
 #define RC62 62
 #define RC63 63
 
-/* Byte 20: DIMM type information */
+/* Byte 3: Module type information */
 #define SPD_UNDEFINED 0x00
 #define SPD_RDIMM 0x01
 #define SPD_UDIMM 0x02
@@ -300,4 +300,6 @@ enum spd_memory_type {
 #define SPD_MINI_RDIMM 0x10
 #define SPD_MINI_UDIMM 0x20
 
+#define SPD_ECC_8BIT (1<<3)
+
 #endif