+int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
+ disk_partition_t *partitions, int parts)
+{
+ u32 offset = (u32)le32_to_cpu(gpt_h->first_usable_lba);
+ ulong start;
+ int i, k;
+ size_t efiname_len, dosname_len;
+#ifdef CONFIG_PARTITION_UUIDS
+ char *str_uuid;
+#endif
+
+ for (i = 0; i < parts; i++) {
+ /* partition starting lba */
+ start = partitions[i].start;
+ if (start && (start < offset)) {
+ printf("Partition overlap\n");
+ return -1;
+ }
+ if (start) {
+ gpt_e[i].starting_lba = cpu_to_le64(start);
+ offset = start + partitions[i].size;
+ } else {
+ gpt_e[i].starting_lba = cpu_to_le64(offset);
+ offset += partitions[i].size;
+ }
+ if (offset >= gpt_h->last_usable_lba) {
+ printf("Partitions layout exceds disk size\n");
+ return -1;
+ }
+ /* partition ending lba */
+ if ((i == parts - 1) && (partitions[i].size == 0))
+ /* extend the last partition to maximuim */
+ gpt_e[i].ending_lba = gpt_h->last_usable_lba;
+ else
+ gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
+
+ /* partition type GUID */
+ memcpy(gpt_e[i].partition_type_guid.b,
+ &PARTITION_BASIC_DATA_GUID, 16);
+
+#ifdef CONFIG_PARTITION_UUIDS
+ str_uuid = partitions[i].uuid;
+ if (string_uuid(str_uuid, gpt_e[i].unique_partition_guid.b)) {
+ printf("Partition no. %d: invalid guid: %s\n",
+ i, str_uuid);
+ return -1;
+ }
+#endif
+
+ /* partition attributes */
+ memset(&gpt_e[i].attributes, 0,
+ sizeof(gpt_entry_attributes));
+
+ /* partition name */
+ efiname_len = sizeof(gpt_e[i].partition_name)
+ / sizeof(efi_char16_t);
+ dosname_len = sizeof(partitions[i].name);
+
+ memset(gpt_e[i].partition_name, 0,
+ sizeof(gpt_e[i].partition_name));
+
+ for (k = 0; k < min(dosname_len, efiname_len); k++)
+ gpt_e[i].partition_name[k] =
+ (efi_char16_t)(partitions[i].name[k]);
+
+ debug("%s: name: %s offset[%d]: 0x%x size[%d]: 0x" LBAF "\n",
+ __func__, partitions[i].name, i,
+ offset, i, partitions[i].size);
+ }
+
+ return 0;
+}
+
+int gpt_fill_header(block_dev_desc_t *dev_desc, gpt_header *gpt_h,
+ char *str_guid, int parts_count)
+{
+ gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
+ gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
+ gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
+ gpt_h->my_lba = cpu_to_le64(1);
+ gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
+ gpt_h->first_usable_lba = cpu_to_le64(34);
+ gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
+ gpt_h->partition_entry_lba = cpu_to_le64(2);
+ gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
+ gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
+ gpt_h->header_crc32 = 0;
+ gpt_h->partition_entry_array_crc32 = 0;
+
+ if (string_uuid(str_guid, gpt_h->disk_guid.b))
+ return -1;
+
+ return 0;
+}
+
+int gpt_restore(block_dev_desc_t *dev_desc, char *str_disk_guid,
+ disk_partition_t *partitions, int parts_count)
+{
+ int ret;
+
+ gpt_header *gpt_h = calloc(1, PAD_TO_BLOCKSIZE(sizeof(gpt_header),
+ dev_desc));
+ gpt_entry *gpt_e;
+
+ if (gpt_h == NULL) {
+ printf("%s: calloc failed!\n", __func__);
+ return -1;
+ }
+
+ gpt_e = calloc(1, PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
+ * sizeof(gpt_entry),
+ dev_desc));
+ if (gpt_e == NULL) {
+ printf("%s: calloc failed!\n", __func__);
+ free(gpt_h);
+ return -1;
+ }
+
+ /* Generate Primary GPT header (LBA1) */
+ ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
+ if (ret)
+ goto err;
+
+ /* Generate partition entries */
+ ret = gpt_fill_pte(gpt_h, gpt_e, partitions, parts_count);
+ if (ret)
+ goto err;
+
+ /* Write GPT partition table */
+ ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
+
+err:
+ free(gpt_e);
+ free(gpt_h);
+ return ret;
+}
+#endif
+