1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/partition/gpt.c b/drivers/partition/gpt.c
new file mode 100644
index 0000000..8b1046d
--- /dev/null
+++ b/drivers/partition/gpt.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+
+#include <common/debug.h>
+#include <drivers/partition/efi.h>
+#include <drivers/partition/gpt.h>
+#include <lib/utils.h>
+
+static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out)
+{
+	uint8_t *name;
+	int i;
+
+	assert((str_in != NULL) && (str_out != NULL));
+
+	name = (uint8_t *)str_in;
+
+	assert(name[0] != '\0');
+
+	/* check whether the unicode string is valid */
+	for (i = 1; i < (EFI_NAMELEN << 1); i += 2) {
+		if (name[i] != '\0') {
+			return -EINVAL;
+		}
+	}
+	/* convert the unicode string to ascii string */
+	for (i = 0; i < (EFI_NAMELEN << 1); i += 2) {
+		str_out[i >> 1] = name[i];
+		if (name[i] == '\0') {
+			break;
+		}
+	}
+	return 0;
+}
+
+int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry)
+{
+	int result;
+
+	assert((gpt_entry != NULL) && (entry != NULL));
+
+	if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) {
+		return -EINVAL;
+	}
+
+	zeromem(entry, sizeof(partition_entry_t));
+	result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name);
+	if (result != 0) {
+		return result;
+	}
+	entry->start = (uint64_t)gpt_entry->first_lba *
+		       PLAT_PARTITION_BLOCK_SIZE;
+	entry->length = (uint64_t)(gpt_entry->last_lba -
+				   gpt_entry->first_lba + 1) *
+			PLAT_PARTITION_BLOCK_SIZE;
+	guidcpy(&entry->part_guid, &gpt_entry->unique_uuid);
+	guidcpy(&entry->type_guid, &gpt_entry->type_uuid);
+
+	return 0;
+}