1201b66b7SHaojian Zhuang /* 232f0d3c6SDouglas Raillard * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved. 3201b66b7SHaojian Zhuang * 482cb2c1aSdp-arm * SPDX-License-Identifier: BSD-3-Clause 5201b66b7SHaojian Zhuang */ 6201b66b7SHaojian Zhuang 7201b66b7SHaojian Zhuang #include <assert.h> 8201b66b7SHaojian Zhuang #include <debug.h> 9201b66b7SHaojian Zhuang #include <errno.h> 10201b66b7SHaojian Zhuang #include <gpt.h> 11201b66b7SHaojian Zhuang #include <string.h> 1232f0d3c6SDouglas Raillard #include <utils.h> 13201b66b7SHaojian Zhuang 14201b66b7SHaojian Zhuang static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out) 15201b66b7SHaojian Zhuang { 16*4cb17707SYann Gautier uint8_t *name; 17201b66b7SHaojian Zhuang int i; 18201b66b7SHaojian Zhuang 19*4cb17707SYann Gautier assert((str_in != NULL) && (str_out != NULL)); 20*4cb17707SYann Gautier 21*4cb17707SYann Gautier name = (uint8_t *)str_in; 22*4cb17707SYann Gautier 23*4cb17707SYann Gautier assert(name[0] != '\0'); 24201b66b7SHaojian Zhuang 25201b66b7SHaojian Zhuang /* check whether the unicode string is valid */ 26201b66b7SHaojian Zhuang for (i = 1; i < (EFI_NAMELEN << 1); i += 2) { 27201b66b7SHaojian Zhuang if (name[i] != '\0') 28201b66b7SHaojian Zhuang return -EINVAL; 29201b66b7SHaojian Zhuang } 30201b66b7SHaojian Zhuang /* convert the unicode string to ascii string */ 31201b66b7SHaojian Zhuang for (i = 0; i < (EFI_NAMELEN << 1); i += 2) { 32201b66b7SHaojian Zhuang str_out[i >> 1] = name[i]; 33201b66b7SHaojian Zhuang if (name[i] == '\0') 34201b66b7SHaojian Zhuang break; 35201b66b7SHaojian Zhuang } 36201b66b7SHaojian Zhuang return 0; 37201b66b7SHaojian Zhuang } 38201b66b7SHaojian Zhuang 39201b66b7SHaojian Zhuang int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry) 40201b66b7SHaojian Zhuang { 41201b66b7SHaojian Zhuang int result; 42201b66b7SHaojian Zhuang 43*4cb17707SYann Gautier assert((gpt_entry != NULL) && (entry != NULL)); 44201b66b7SHaojian Zhuang 45201b66b7SHaojian Zhuang if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) { 46201b66b7SHaojian Zhuang return -EINVAL; 47201b66b7SHaojian Zhuang } 48201b66b7SHaojian Zhuang 4932f0d3c6SDouglas Raillard zeromem(entry, sizeof(partition_entry_t)); 50201b66b7SHaojian Zhuang result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name); 51201b66b7SHaojian Zhuang if (result != 0) { 52201b66b7SHaojian Zhuang return result; 53201b66b7SHaojian Zhuang } 54201b66b7SHaojian Zhuang entry->start = (uint64_t)gpt_entry->first_lba * PARTITION_BLOCK_SIZE; 55201b66b7SHaojian Zhuang entry->length = (uint64_t)(gpt_entry->last_lba - 56201b66b7SHaojian Zhuang gpt_entry->first_lba + 1) * 57201b66b7SHaojian Zhuang PARTITION_BLOCK_SIZE; 58201b66b7SHaojian Zhuang return 0; 59201b66b7SHaojian Zhuang } 60