soc/intel/common: Add utility to load VBT file

Change-Id: I8d3d47ca2fc1fc4c10e61c04b941b6378b9c0f80
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14815
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/soc/intel/common/vbt.c b/src/soc/intel/common/vbt.c
new file mode 100644
index 0000000000..80b17a2f87
--- /dev/null
+++ b/src/soc/intel/common/vbt.c
@@ -0,0 +1,42 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corporation.
+ *
+ * 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.
+ */
+
+#include <cbfs.h>
+#include <console/console.h>
+
+#include "vbt.h"
+
+#define VBT_SIGNATURE 0x54425624
+
+enum cb_err locate_vbt(struct region_device *rdev)
+{
+	uint32_t vbtsig = 0;
+	struct cbfsf file_desc;
+
+	if (cbfs_boot_locate(&file_desc, "vbt.bin", NULL) < 0) {
+		printk(BIOS_ERR, "Could not locate a VBT file in in CBFS\n");
+		return CB_ERR;
+	}
+
+	cbfs_file_data(rdev, &file_desc);
+	rdev_readat(rdev, &vbtsig, 0, sizeof(uint32_t));
+
+	if (vbtsig != VBT_SIGNATURE) {
+		printk(BIOS_ERR, "Missing/invalid signature in VBT data file!\n");
+		return CB_ERR;
+	}
+
+	return CB_SUCCESS;
+}