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 /* convert the unicode string to ascii string */ 33 for (i = 0; i < (EFI_NAMELEN << 1); i += 2) { 34 str_out[i >> 1] = name[i]; 35 if (name[i] == '\0') 36 break; 37 } 38 return 0; 39 } 40 parse_gpt_entry(gpt_entry_t * gpt_entry,partition_entry_t * entry)41int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry) 42 { 43 int result; 44 45 assert((gpt_entry != NULL) && (entry != NULL)); 46 47 if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) { 48 return -EINVAL; 49 } 50 51 zeromem(entry, sizeof(partition_entry_t)); 52 result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name); 53 if (result != 0) { 54 return result; 55 } 56 entry->start = (uint64_t)gpt_entry->first_lba * 57 PLAT_PARTITION_BLOCK_SIZE; 58 entry->length = (uint64_t)(gpt_entry->last_lba - 59 gpt_entry->first_lba + 1) * 60 PLAT_PARTITION_BLOCK_SIZE; 61 guidcpy(&entry->part_guid, &gpt_entry->unique_uuid); 62 guidcpy(&entry->type_guid, &gpt_entry->type_uuid); 63 64 return 0; 65 } 66