blob: 9240d5a7bff6ccf9316672c2b144dc75c7566055 [file] [log] [blame]
Haojian Zhuang91f56462016-07-28 14:19:36 +08001/*
2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <assert.h>
32#include <debug.h>
33#include <errno.h>
34#include <gpt.h>
35#include <string.h>
36
37static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out)
38{
39 uint8_t *name = (uint8_t *)str_in;
40 int i;
41
42 assert((str_in != NULL) && (str_out != NULL) && (name[0] != '\0'));
43
44 /* check whether the unicode string is valid */
45 for (i = 1; i < (EFI_NAMELEN << 1); i += 2) {
46 if (name[i] != '\0')
47 return -EINVAL;
48 }
49 /* convert the unicode string to ascii string */
50 for (i = 0; i < (EFI_NAMELEN << 1); i += 2) {
51 str_out[i >> 1] = name[i];
52 if (name[i] == '\0')
53 break;
54 }
55 return 0;
56}
57
58int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry)
59{
60 int result;
61
62 assert((gpt_entry != 0) && (entry != 0));
63
64 if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) {
65 return -EINVAL;
66 }
67
68 memset(entry, 0, sizeof(partition_entry_t));
69 result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name);
70 if (result != 0) {
71 return result;
72 }
73 entry->start = (uint64_t)gpt_entry->first_lba * PARTITION_BLOCK_SIZE;
74 entry->length = (uint64_t)(gpt_entry->last_lba -
75 gpt_entry->first_lba + 1) *
76 PARTITION_BLOCK_SIZE;
77 return 0;
78}