src/lib/dimm_info_util.c: Add methods to convert from SMBIOS to SPD

AMD AGESA returns DIMM info in SMBIOS format. dimm_info expects the data
in SPD format. These methods will be used to update amd_late_init.c so
it sets the correct values.

BUG=b:65403853
TEST=Built and booted grunt. Methods are not called in this commit. So
they were tested with the later commit by verifying the output of
dmidecode.

Change-Id: Id9fa98e9aad83dfd0a86f45e18b3c312665dce9b
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/25412
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/src/include/dimm_info_util.h b/src/include/dimm_info_util.h
new file mode 100644
index 000000000000..27d278bd16e2
--- /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