1 /* 2 * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <errno.h> 9 #include <string.h> 10 11 #include <common/debug.h> 12 #include <drivers/partition/efi.h> 13 #include <drivers/partition/gpt.h> 14 #include <lib/utils.h> 15 unicode_to_ascii(unsigned short * str_in,unsigned char * str_out)16static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out) 17 { 18 uint8_t *name; 19 int i; 20 21 assert((str_in != NULL) && (str_out != NULL)); 22 23 name = (uint8_t *)str_in; 24 25 assert(name[0] != '\0'); 26 27 /* check whether the unicode string is valid */ 28 for (i = 1; i < (EFI_NAMELEN << 1); i += 2) { 29 if (name[i] != '\0') { 30 return -EINVAL; 31 } 32 } 33 /* convert the unicode string to ascii string */ 34 for (i = 0; i < (EFI_NAMELEN << 1); i += 2) { 35 str_out[i >> 1] = name[i]; 36 if (name[i] == '\0') { 37 break; 38 } 39 } 40 return 0; 41 } 42 parse_gpt_entry(gpt_entry_t * gpt_entry,partition_entry_t * entry)43int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry) 44 { 45 int result; 46 47 assert((gpt_entry != NULL) && (entry != NULL)); 48 49 if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) { 50 return -EINVAL; 51 } 52 53 zeromem(entry, sizeof(partition_entry_t)); 54 result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name); 55 if (result != 0) { 56 return result; 57 } 58 entry->start = (uint64_t)gpt_entry->first_lba * 59 PLAT_PARTITION_BLOCK_SIZE; 60 entry->length = (uint64_t)(gpt_entry->last_lba - 61 gpt_entry->first_lba + 1) * 62 PLAT_PARTITION_BLOCK_SIZE; 63 guidcpy(&entry->part_guid, &gpt_entry->unique_uuid); 64 guidcpy(&entry->type_guid, &gpt_entry->type_uuid); 65 66 return 0; 67 } 68
