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-rw-r--r--drivers/partition/gpt.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/partition/gpt.c b/drivers/partition/gpt.c
new file mode 100644
index 0000000..4fe8322
--- /dev/null
+++ b/drivers/partition/gpt.c
@@ -0,0 +1,65 @@
+/*
+ * 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;
+}