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