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richardretanubun07f3d782008-09-26 11:13:22 -04001/*
2 * Copyright (C) 2008 RuggedCom, Inc.
3 * Richard Retanubun <RichardRetanubun@RuggedCom.com>
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
richardretanubun07f3d782008-09-26 11:13:22 -04006 */
7
8/*
Steve Raee04350d2014-05-26 11:52:23 -07009 * NOTE:
10 * when CONFIG_SYS_64BIT_LBA is not defined, lbaint_t is 32 bits; this
11 * limits the maximum size of addressable storage to < 2 Terra Bytes
richardretanubun07f3d782008-09-26 11:13:22 -040012 */
Marc Dietrich8faefad2013-03-29 07:57:10 +000013#include <asm/unaligned.h>
richardretanubun07f3d782008-09-26 11:13:22 -040014#include <common.h>
15#include <command.h>
Philipp Tomsich02e43532017-03-01 21:10:39 +010016#include <fdtdec.h>
richardretanubun07f3d782008-09-26 11:13:22 -040017#include <ide.h>
Simon Glasse48f3742014-11-11 12:47:07 -070018#include <inttypes.h>
richardretanubun07f3d782008-09-26 11:13:22 -040019#include <malloc.h>
Simon Glasscf92e052015-09-02 17:24:58 -060020#include <memalign.h>
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +010021#include <part_efi.h>
Philipp Tomsich02e43532017-03-01 21:10:39 +010022#include <linux/compiler.h>
Lei Wen6eecc032011-09-07 18:11:19 +000023#include <linux/ctype.h>
richardretanubun07f3d782008-09-26 11:13:22 -040024
Lukasz Majewski40684dd2012-12-11 11:09:46 +010025DECLARE_GLOBAL_DATA_PTR;
26
Stephen Warren2c1af9d2013-02-28 15:03:46 +000027#ifdef HAVE_BLOCK_DEVICE
richardretanubun07f3d782008-09-26 11:13:22 -040028/**
29 * efi_crc32() - EFI version of crc32 function
30 * @buf: buffer to calculate crc32 of
31 * @len - length of buf
32 *
33 * Description: Returns EFI-style CRC32 value for @buf
34 */
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +010035static inline u32 efi_crc32(const void *buf, u32 len)
richardretanubun07f3d782008-09-26 11:13:22 -040036{
37 return crc32(0, buf, len);
38}
39
40/*
41 * Private function prototypes
42 */
43
44static int pmbr_part_valid(struct partition *part);
45static int is_pmbr_valid(legacy_mbr * mbr);
Simon Glass4101f682016-02-29 15:25:34 -070046static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
Steve Raee04350d2014-05-26 11:52:23 -070047 gpt_header *pgpt_head, gpt_entry **pgpt_pte);
Simon Glass4101f682016-02-29 15:25:34 -070048static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
49 gpt_header *pgpt_head);
richardretanubun07f3d782008-09-26 11:13:22 -040050static int is_pte_valid(gpt_entry * pte);
51
Lei Wen6eecc032011-09-07 18:11:19 +000052static char *print_efiname(gpt_entry *pte)
53{
54 static char name[PARTNAME_SZ + 1];
55 int i;
56 for (i = 0; i < PARTNAME_SZ; i++) {
57 u8 c;
58 c = pte->partition_name[i] & 0xff;
59 c = (c && !isprint(c)) ? '.' : c;
60 name[i] = c;
61 }
62 name[PARTNAME_SZ] = 0;
63 return name;
64}
65
Stephen Warrenb4414f42012-10-08 08:14:37 +000066static efi_guid_t system_guid = PARTITION_SYSTEM_GUID;
67
68static inline int is_bootable(gpt_entry *p)
69{
70 return p->attributes.fields.legacy_bios_bootable ||
71 !memcmp(&(p->partition_type_guid), &system_guid,
72 sizeof(efi_guid_t));
73}
74
Steve Raee1f6b0a2014-12-18 12:13:42 +010075static int validate_gpt_header(gpt_header *gpt_h, lbaint_t lba,
76 lbaint_t lastlba)
77{
78 uint32_t crc32_backup = 0;
79 uint32_t calc_crc32;
80
81 /* Check the GPT header signature */
82 if (le64_to_cpu(gpt_h->signature) != GPT_HEADER_SIGNATURE) {
83 printf("%s signature is wrong: 0x%llX != 0x%llX\n",
84 "GUID Partition Table Header",
85 le64_to_cpu(gpt_h->signature),
86 GPT_HEADER_SIGNATURE);
87 return -1;
88 }
89
90 /* Check the GUID Partition Table CRC */
91 memcpy(&crc32_backup, &gpt_h->header_crc32, sizeof(crc32_backup));
92 memset(&gpt_h->header_crc32, 0, sizeof(gpt_h->header_crc32));
93
94 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
95 le32_to_cpu(gpt_h->header_size));
96
97 memcpy(&gpt_h->header_crc32, &crc32_backup, sizeof(crc32_backup));
98
99 if (calc_crc32 != le32_to_cpu(crc32_backup)) {
100 printf("%s CRC is wrong: 0x%x != 0x%x\n",
101 "GUID Partition Table Header",
102 le32_to_cpu(crc32_backup), calc_crc32);
103 return -1;
104 }
105
106 /*
107 * Check that the my_lba entry points to the LBA that contains the GPT
108 */
109 if (le64_to_cpu(gpt_h->my_lba) != lba) {
110 printf("GPT: my_lba incorrect: %llX != " LBAF "\n",
111 le64_to_cpu(gpt_h->my_lba),
112 lba);
113 return -1;
114 }
115
116 /*
117 * Check that the first_usable_lba and that the last_usable_lba are
118 * within the disk.
119 */
120 if (le64_to_cpu(gpt_h->first_usable_lba) > lastlba) {
121 printf("GPT: first_usable_lba incorrect: %llX > " LBAF "\n",
122 le64_to_cpu(gpt_h->first_usable_lba), lastlba);
123 return -1;
124 }
125 if (le64_to_cpu(gpt_h->last_usable_lba) > lastlba) {
126 printf("GPT: last_usable_lba incorrect: %llX > " LBAF "\n",
127 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
128 return -1;
129 }
130
131 debug("GPT: first_usable_lba: %llX last_usable_lba: %llX last lba: "
132 LBAF "\n", le64_to_cpu(gpt_h->first_usable_lba),
133 le64_to_cpu(gpt_h->last_usable_lba), lastlba);
134
135 return 0;
136}
137
138static int validate_gpt_entries(gpt_header *gpt_h, gpt_entry *gpt_e)
139{
140 uint32_t calc_crc32;
141
142 /* Check the GUID Partition Table Entry Array CRC */
143 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
144 le32_to_cpu(gpt_h->num_partition_entries) *
145 le32_to_cpu(gpt_h->sizeof_partition_entry));
146
147 if (calc_crc32 != le32_to_cpu(gpt_h->partition_entry_array_crc32)) {
148 printf("%s: 0x%x != 0x%x\n",
149 "GUID Partition Table Entry Array CRC is wrong",
150 le32_to_cpu(gpt_h->partition_entry_array_crc32),
151 calc_crc32);
152 return -1;
153 }
154
155 return 0;
156}
157
158static void prepare_backup_gpt_header(gpt_header *gpt_h)
159{
160 uint32_t calc_crc32;
161 uint64_t val;
162
163 /* recalculate the values for the Backup GPT Header */
164 val = le64_to_cpu(gpt_h->my_lba);
165 gpt_h->my_lba = gpt_h->alternate_lba;
166 gpt_h->alternate_lba = cpu_to_le64(val);
Steve Rae0ff7e582014-12-12 15:51:54 -0800167 gpt_h->partition_entry_lba =
168 cpu_to_le64(le64_to_cpu(gpt_h->last_usable_lba) + 1);
Steve Raee1f6b0a2014-12-18 12:13:42 +0100169 gpt_h->header_crc32 = 0;
170
171 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
172 le32_to_cpu(gpt_h->header_size));
173 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
174}
175
Patrick Delaunaybd42a942017-01-27 11:00:41 +0100176#if CONFIG_IS_ENABLED(EFI_PARTITION)
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000177/*
178 * Public Functions (include/part.h)
179 */
180
Alison Chaiken73d6d182017-06-25 16:43:23 -0700181/*
182 * UUID is displayed as 32 hexadecimal digits, in 5 groups,
183 * separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters
184 */
185int get_disk_guid(struct blk_desc * dev_desc, char *guid)
186{
187 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
188 gpt_entry *gpt_pte = NULL;
189 unsigned char *guid_bin;
190
191 /* This function validates AND fills in the GPT header and PTE */
192 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
193 gpt_head, &gpt_pte) != 1) {
194 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
195 if (is_gpt_valid(dev_desc, dev_desc->lba - 1,
196 gpt_head, &gpt_pte) != 1) {
197 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
198 __func__);
199 return -EINVAL;
200 } else {
201 printf("%s: *** Using Backup GPT ***\n",
202 __func__);
203 }
204 }
205
206 guid_bin = gpt_head->disk_guid.b;
207 uuid_bin_to_str(guid_bin, guid, UUID_STR_FORMAT_GUID);
208
209 return 0;
210}
211
Simon Glass084bf4c2016-02-29 15:26:04 -0700212void part_print_efi(struct blk_desc *dev_desc)
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000213{
Egbert Eichae1768a2013-04-09 06:03:36 +0000214 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000215 gpt_entry *gpt_pte = NULL;
216 int i = 0;
Alison Chaikendb9b6202017-06-25 16:43:17 -0700217 char uuid[UUID_STR_LEN + 1];
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200218 unsigned char *uuid_bin;
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000219
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000220 /* This function validates AND fills in the GPT header and PTE */
221 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
222 gpt_head, &gpt_pte) != 1) {
223 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
Steve Raeae95fad2014-05-05 13:00:08 -0700224 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
225 gpt_head, &gpt_pte) != 1) {
226 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
227 __func__);
228 return;
229 } else {
230 printf("%s: *** Using Backup GPT ***\n",
231 __func__);
232 }
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000233 }
234
235 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
236
237 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
Stephen Warren13bf2f52012-10-08 08:14:36 +0000238 printf("\tAttributes\n");
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200239 printf("\tType GUID\n");
240 printf("\tPartition GUID\n");
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000241
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100242 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000243 /* Stop at the first non valid PTE */
244 if (!is_pte_valid(&gpt_pte[i]))
245 break;
246
247 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100248 le64_to_cpu(gpt_pte[i].starting_lba),
249 le64_to_cpu(gpt_pte[i].ending_lba),
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000250 print_efiname(&gpt_pte[i]));
Stephen Warren13bf2f52012-10-08 08:14:36 +0000251 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200252 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200253 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000254 printf("\ttype:\t%s\n", uuid);
Patrick Delaunaybcb41dc2015-10-27 11:00:28 +0100255#ifdef CONFIG_PARTITION_TYPE_GUID
256 if (!uuid_guid_get_str(uuid_bin, uuid))
257 printf("\ttype:\t%s\n", uuid);
258#endif
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200259 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200260 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
261 printf("\tguid:\t%s\n", uuid);
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000262 }
263
264 /* Remember to free pte */
265 free(gpt_pte);
266 return;
267}
Stephen Warren894bfbb2012-09-21 09:50:59 +0000268
Simon Glass3e8bd462016-02-29 15:25:48 -0700269int part_get_info_efi(struct blk_desc *dev_desc, int part,
270 disk_partition_t *info)
richardretanubun07f3d782008-09-26 11:13:22 -0400271{
Egbert Eichae1768a2013-04-09 06:03:36 +0000272 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
Doug Andersondeb5ca82011-10-19 09:47:31 +0000273 gpt_entry *gpt_pte = NULL;
richardretanubun07f3d782008-09-26 11:13:22 -0400274
275 /* "part" argument must be at least 1 */
Simon Glass4708a072016-03-16 07:45:36 -0600276 if (part < 1) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000277 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400278 return -1;
279 }
280
281 /* This function validates AND fills in the GPT header and PTE */
282 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
Stephen Warren4715a812011-10-28 09:21:46 +0000283 gpt_head, &gpt_pte) != 1) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000284 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
Steve Raeae95fad2014-05-05 13:00:08 -0700285 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
286 gpt_head, &gpt_pte) != 1) {
287 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
288 __func__);
289 return -1;
290 } else {
291 printf("%s: *** Using Backup GPT ***\n",
292 __func__);
293 }
richardretanubun07f3d782008-09-26 11:13:22 -0400294 }
295
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100296 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
Stephen Warrenc04d68c2012-09-21 09:50:58 +0000297 !is_pte_valid(&gpt_pte[part - 1])) {
Mark Langsdorf6d2ee5a2013-09-10 15:14:56 -0500298 debug("%s: *** ERROR: Invalid partition number %d ***\n",
Stephen Warrenc04d68c2012-09-21 09:50:58 +0000299 __func__, part);
Mark Langsdorf6d2ee5a2013-09-10 15:14:56 -0500300 free(gpt_pte);
Stephen Warrenc04d68c2012-09-21 09:50:58 +0000301 return -1;
302 }
303
Steve Raee04350d2014-05-26 11:52:23 -0700304 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
305 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
Richard Retanubun50970832009-01-26 08:45:14 -0500306 /* The ending LBA is inclusive, to calculate size, add 1 to it */
Steve Raee04350d2014-05-26 11:52:23 -0700307 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
Richard Retanubun50970832009-01-26 08:45:14 -0500308 - info->start;
Egbert Eichae1768a2013-04-09 06:03:36 +0000309 info->blksz = dev_desc->blksz;
richardretanubun07f3d782008-09-26 11:13:22 -0400310
Lei Wen6eecc032011-09-07 18:11:19 +0000311 sprintf((char *)info->name, "%s",
Doug Andersondeb5ca82011-10-19 09:47:31 +0000312 print_efiname(&gpt_pte[part - 1]));
Ben Whitten192bc692015-12-30 13:05:58 +0000313 strcpy((char *)info->type, "U-Boot");
Stephen Warrenb4414f42012-10-08 08:14:37 +0000314 info->bootable = is_bootable(&gpt_pte[part - 1]);
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100315#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200316 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
317 UUID_STR_FORMAT_GUID);
Stephen Warren894bfbb2012-09-21 09:50:59 +0000318#endif
Patrick Delaunay7561b252015-10-27 11:00:27 +0100319#ifdef CONFIG_PARTITION_TYPE_GUID
320 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
321 info->type_guid, UUID_STR_FORMAT_GUID);
322#endif
richardretanubun07f3d782008-09-26 11:13:22 -0400323
Steve Rae60bf9412014-05-26 11:52:24 -0700324 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
Frederic Leroy04735e92013-06-26 18:11:25 +0200325 info->start, info->size, info->name);
richardretanubun07f3d782008-09-26 11:13:22 -0400326
327 /* Remember to free pte */
Doug Andersondeb5ca82011-10-19 09:47:31 +0000328 free(gpt_pte);
richardretanubun07f3d782008-09-26 11:13:22 -0400329 return 0;
330}
331
Simon Glass084bf4c2016-02-29 15:26:04 -0700332static int part_test_efi(struct blk_desc *dev_desc)
richardretanubun07f3d782008-09-26 11:13:22 -0400333{
Egbert Eichae1768a2013-04-09 06:03:36 +0000334 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
richardretanubun07f3d782008-09-26 11:13:22 -0400335
336 /* Read legacy MBR from block 0 and validate it */
Simon Glass2a981dc2016-02-29 15:25:52 -0700337 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
Anton staaff75dd582011-10-12 13:56:04 +0000338 || (is_pmbr_valid(legacymbr) != 1)) {
richardretanubun07f3d782008-09-26 11:13:22 -0400339 return -1;
340 }
341 return 0;
342}
343
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100344/**
345 * set_protective_mbr(): Set the EFI protective MBR
346 * @param dev_desc - block device descriptor
347 *
348 * @return - zero on success, otherwise error
349 */
Simon Glass4101f682016-02-29 15:25:34 -0700350static int set_protective_mbr(struct blk_desc *dev_desc)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100351{
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100352 /* Setup the Protective MBR */
Patrick Delaunay3cc56612017-11-17 10:08:18 +0100353 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, p_mbr, 1, dev_desc->blksz);
Hector Palacios61fcc7d2014-02-13 09:48:24 +0100354 memset(p_mbr, 0, sizeof(*p_mbr));
355
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100356 if (p_mbr == NULL) {
357 printf("%s: calloc failed!\n", __func__);
358 return -1;
359 }
Vincent Tinellie163a932017-01-30 15:46:07 +0300360
361 /* Read MBR to backup boot code if it exists */
362 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +0900363 pr_err("** Can't read from device %d **\n", dev_desc->devnum);
Vincent Tinellie163a932017-01-30 15:46:07 +0300364 return -1;
365 }
366
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100367 /* Append signature */
368 p_mbr->signature = MSDOS_MBR_SIGNATURE;
369 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
370 p_mbr->partition_record[0].start_sect = 1;
Maxime Ripardb349abb2015-01-08 12:26:44 +0100371 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100372
373 /* Write MBR sector to the MMC device */
Simon Glass2a981dc2016-02-29 15:25:52 -0700374 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100375 printf("** Can't write to device %d **\n",
Simon Glassbcce53d2016-02-29 15:25:51 -0700376 dev_desc->devnum);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100377 return -1;
378 }
379
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100380 return 0;
381}
382
Simon Glass4101f682016-02-29 15:25:34 -0700383int write_gpt_table(struct blk_desc *dev_desc,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100384 gpt_header *gpt_h, gpt_entry *gpt_e)
385{
Egbert Eichae1768a2013-04-09 06:03:36 +0000386 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
387 * sizeof(gpt_entry)), dev_desc);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100388 u32 calc_crc32;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100389
390 debug("max lba: %x\n", (u32) dev_desc->lba);
391 /* Setup the Protective MBR */
392 if (set_protective_mbr(dev_desc) < 0)
393 goto err;
394
395 /* Generate CRC for the Primary GPT Header */
396 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
397 le32_to_cpu(gpt_h->num_partition_entries) *
398 le32_to_cpu(gpt_h->sizeof_partition_entry));
399 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
400
401 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
402 le32_to_cpu(gpt_h->header_size));
403 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
404
405 /* Write the First GPT to the block right after the Legacy MBR */
Simon Glass2a981dc2016-02-29 15:25:52 -0700406 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100407 goto err;
408
Philipp Tomsich02e43532017-03-01 21:10:39 +0100409 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
410 pte_blk_cnt, gpt_e) != pte_blk_cnt)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100411 goto err;
412
Steve Raee1f6b0a2014-12-18 12:13:42 +0100413 prepare_backup_gpt_header(gpt_h);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100414
Simon Glass2a981dc2016-02-29 15:25:52 -0700415 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
416 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100417 goto err;
418
Simon Glass2a981dc2016-02-29 15:25:52 -0700419 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
420 gpt_h) != 1)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100421 goto err;
422
423 debug("GPT successfully written to block device!\n");
424 return 0;
425
426 err:
Simon Glassbcce53d2016-02-29 15:25:51 -0700427 printf("** Can't write to device %d **\n", dev_desc->devnum);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100428 return -1;
429}
430
Maxime Ripard47d7ee42017-08-23 16:01:32 +0200431int gpt_fill_pte(struct blk_desc *dev_desc,
432 gpt_header *gpt_h, gpt_entry *gpt_e,
433 disk_partition_t *partitions, int parts)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100434{
Steve Raee04350d2014-05-26 11:52:23 -0700435 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
Steve Raee04350d2014-05-26 11:52:23 -0700436 lbaint_t last_usable_lba = (lbaint_t)
437 le64_to_cpu(gpt_h->last_usable_lba);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100438 int i, k;
Marek Vasut67cd4a62013-05-19 12:53:34 +0000439 size_t efiname_len, dosname_len;
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100440#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100441 char *str_uuid;
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200442 unsigned char *bin_uuid;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100443#endif
Patrick Delaunay7561b252015-10-27 11:00:27 +0100444#ifdef CONFIG_PARTITION_TYPE_GUID
445 char *str_type_guid;
446 unsigned char *bin_type_guid;
447#endif
Maxime Ripard79c59122017-08-23 16:01:33 +0200448 size_t hdr_start = gpt_h->my_lba;
449 size_t hdr_end = hdr_start + 1;
450
451 size_t pte_start = gpt_h->partition_entry_lba;
452 size_t pte_end = pte_start +
453 gpt_h->num_partition_entries * gpt_h->sizeof_partition_entry /
454 dev_desc->blksz;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100455
456 for (i = 0; i < parts; i++) {
457 /* partition starting lba */
Maxime Ripard5276e8b2017-08-23 16:01:31 +0200458 lbaint_t start = partitions[i].start;
459 lbaint_t size = partitions[i].size;
460
Maxime Ripard79c59122017-08-23 16:01:33 +0200461 if (start) {
462 offset = start + size;
463 } else {
464 start = offset;
465 offset += size;
466 }
467
468 /*
469 * If our partition overlaps with either the GPT
470 * header, or the partition entry, reject it.
471 */
Patrick Delaunayae0e0222017-10-18 15:11:05 +0200472 if (((start < hdr_end && hdr_start < (start + size)) ||
473 (start < pte_end && pte_start < (start + size)))) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100474 printf("Partition overlap\n");
475 return -1;
476 }
Maxime Ripard5276e8b2017-08-23 16:01:31 +0200477
Maxime Ripard79c59122017-08-23 16:01:33 +0200478 gpt_e[i].starting_lba = cpu_to_le64(start);
479
Patrick Delaunaya5653862016-05-02 14:43:33 +0200480 if (offset > (last_usable_lba + 1)) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100481 printf("Partitions layout exceds disk size\n");
482 return -1;
483 }
484 /* partition ending lba */
Maxime Ripard5276e8b2017-08-23 16:01:31 +0200485 if ((i == parts - 1) && (size == 0))
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100486 /* extend the last partition to maximuim */
487 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
488 else
489 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
490
Patrick Delaunay7561b252015-10-27 11:00:27 +0100491#ifdef CONFIG_PARTITION_TYPE_GUID
492 str_type_guid = partitions[i].type_guid;
493 bin_type_guid = gpt_e[i].partition_type_guid.b;
494 if (strlen(str_type_guid)) {
495 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
496 UUID_STR_FORMAT_GUID)) {
497 printf("Partition no. %d: invalid type guid: %s\n",
498 i, str_type_guid);
499 return -1;
500 }
501 } else {
502 /* default partition type GUID */
503 memcpy(bin_type_guid,
504 &PARTITION_BASIC_DATA_GUID, 16);
505 }
506#else
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100507 /* partition type GUID */
508 memcpy(gpt_e[i].partition_type_guid.b,
509 &PARTITION_BASIC_DATA_GUID, 16);
Patrick Delaunay7561b252015-10-27 11:00:27 +0100510#endif
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100511
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100512#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100513 str_uuid = partitions[i].uuid;
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200514 bin_uuid = gpt_e[i].unique_partition_guid.b;
515
Vincent Tinelli9da52f82017-02-27 16:11:15 +0200516 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100517 printf("Partition no. %d: invalid guid: %s\n",
518 i, str_uuid);
519 return -1;
520 }
521#endif
522
523 /* partition attributes */
524 memset(&gpt_e[i].attributes, 0,
525 sizeof(gpt_entry_attributes));
526
Patrick Delaunaycfdaf4c2015-11-17 11:36:52 +0100527 if (partitions[i].bootable)
528 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
529
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100530 /* partition name */
Marek Vasut67cd4a62013-05-19 12:53:34 +0000531 efiname_len = sizeof(gpt_e[i].partition_name)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100532 / sizeof(efi_char16_t);
Marek Vasut67cd4a62013-05-19 12:53:34 +0000533 dosname_len = sizeof(partitions[i].name);
534
535 memset(gpt_e[i].partition_name, 0,
536 sizeof(gpt_e[i].partition_name));
537
538 for (k = 0; k < min(dosname_len, efiname_len); k++)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100539 gpt_e[i].partition_name[k] =
540 (efi_char16_t)(partitions[i].name[k]);
541
Steve Raee04350d2014-05-26 11:52:23 -0700542 debug("%s: name: %s offset[%d]: 0x" LBAF
543 " size[%d]: 0x" LBAF "\n",
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100544 __func__, partitions[i].name, i,
Maxime Ripard5276e8b2017-08-23 16:01:31 +0200545 offset, i, size);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100546 }
547
548 return 0;
549}
550
Philipp Tomsich02e43532017-03-01 21:10:39 +0100551static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
552{
553 uint32_t offset_blks = 2;
Maxime Ripard89d33a22017-08-23 16:01:30 +0200554 uint32_t __maybe_unused offset_bytes;
Philipp Tomsich02e43532017-03-01 21:10:39 +0100555 int __maybe_unused config_offset;
556
557#if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
558 /*
559 * Some architectures require their SPL loader at a fixed
560 * address within the first 16KB of the disk. To avoid an
561 * overlap with the partition entries of the EFI partition
562 * table, the first safe offset (in bytes, from the start of
563 * the disk) for the entries can be set in
564 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
565 */
Maxime Ripard89d33a22017-08-23 16:01:30 +0200566 offset_bytes =
Philipp Tomsich02e43532017-03-01 21:10:39 +0100567 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
Maxime Ripard89d33a22017-08-23 16:01:30 +0200568 offset_blks = offset_bytes / dev_desc->blksz;
Philipp Tomsich02e43532017-03-01 21:10:39 +0100569#endif
570
571#if defined(CONFIG_OF_CONTROL)
572 /*
573 * Allow the offset of the first partition entires (in bytes
574 * from the start of the device) to be specified as a property
575 * of the device tree '/config' node.
576 */
577 config_offset = fdtdec_get_config_int(gd->fdt_blob,
578 "u-boot,efi-partition-entries-offset",
579 -EINVAL);
Maxime Ripard89d33a22017-08-23 16:01:30 +0200580 if (config_offset != -EINVAL) {
581 offset_bytes = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
582 offset_blks = offset_bytes / dev_desc->blksz;
583 }
Philipp Tomsich02e43532017-03-01 21:10:39 +0100584#endif
585
586 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
587
588 /*
589 * The earliest LBA this can be at is LBA#2 (i.e. right behind
590 * the (protective) MBR and the GPT header.
591 */
592 if (offset_blks < 2)
593 offset_blks = 2;
594
595 return offset_blks;
596}
597
Simon Glass4101f682016-02-29 15:25:34 -0700598int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100599 char *str_guid, int parts_count)
600{
601 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
602 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
603 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
604 gpt_h->my_lba = cpu_to_le64(1);
605 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100606 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
Philipp Tomsich02e43532017-03-01 21:10:39 +0100607 gpt_h->partition_entry_lba =
608 cpu_to_le64(partition_entries_offset(dev_desc));
609 gpt_h->first_usable_lba =
610 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100611 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
612 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
613 gpt_h->header_crc32 = 0;
614 gpt_h->partition_entry_array_crc32 = 0;
615
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200616 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100617 return -1;
618
619 return 0;
620}
621
Simon Glass4101f682016-02-29 15:25:34 -0700622int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100623 disk_partition_t *partitions, int parts_count)
624{
Lukasz Majewskibb021012017-10-27 12:28:10 +0200625 gpt_header *gpt_h;
Egbert Eichae1768a2013-04-09 06:03:36 +0000626 gpt_entry *gpt_e;
Lukasz Majewskibb021012017-10-27 12:28:10 +0200627 int ret, size;
Egbert Eichae1768a2013-04-09 06:03:36 +0000628
Lukasz Majewskibb021012017-10-27 12:28:10 +0200629 size = PAD_TO_BLOCKSIZE(sizeof(gpt_header), dev_desc);
630 gpt_h = malloc_cache_aligned(size);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100631 if (gpt_h == NULL) {
632 printf("%s: calloc failed!\n", __func__);
633 return -1;
634 }
Lukasz Majewskibb021012017-10-27 12:28:10 +0200635 memset(gpt_h, 0, size);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100636
Lukasz Majewskibb021012017-10-27 12:28:10 +0200637 size = PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS * sizeof(gpt_entry),
638 dev_desc);
639 gpt_e = malloc_cache_aligned(size);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100640 if (gpt_e == NULL) {
641 printf("%s: calloc failed!\n", __func__);
642 free(gpt_h);
643 return -1;
644 }
Lukasz Majewskibb021012017-10-27 12:28:10 +0200645 memset(gpt_e, 0, size);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100646
647 /* Generate Primary GPT header (LBA1) */
648 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
649 if (ret)
650 goto err;
651
652 /* Generate partition entries */
Maxime Ripard47d7ee42017-08-23 16:01:32 +0200653 ret = gpt_fill_pte(dev_desc, gpt_h, gpt_e, partitions, parts_count);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100654 if (ret)
655 goto err;
656
657 /* Write GPT partition table */
658 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
659
660err:
661 free(gpt_e);
662 free(gpt_h);
663 return ret;
664}
Steve Rae0ff7e582014-12-12 15:51:54 -0800665
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100666static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n)
667{
668 char *ess = (char *)es;
669 int i, j;
670
671 memset(s, '\0', n);
672
673 for (i = 0, j = 0; j < n; i += 2, j++) {
674 s[j] = ess[i];
675 if (!ess[i])
676 return;
677 }
678}
679
Simon Glass4101f682016-02-29 15:25:34 -0700680int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100681 gpt_entry **gpt_pte)
682{
683 /*
684 * This function validates AND
685 * fills in the GPT header and PTE
686 */
687 if (is_gpt_valid(dev_desc,
688 GPT_PRIMARY_PARTITION_TABLE_LBA,
689 gpt_head, gpt_pte) != 1) {
690 printf("%s: *** ERROR: Invalid GPT ***\n",
691 __func__);
692 return -1;
693 }
694 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
695 gpt_head, gpt_pte) != 1) {
696 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
697 __func__);
698 return -1;
699 }
700
701 return 0;
702}
703
Simon Glass4101f682016-02-29 15:25:34 -0700704int gpt_verify_partitions(struct blk_desc *dev_desc,
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100705 disk_partition_t *partitions, int parts,
706 gpt_header *gpt_head, gpt_entry **gpt_pte)
707{
708 char efi_str[PARTNAME_SZ + 1];
709 u64 gpt_part_size;
710 gpt_entry *gpt_e;
711 int ret, i;
712
713 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
714 if (ret)
715 return ret;
716
717 gpt_e = *gpt_pte;
718
719 for (i = 0; i < parts; i++) {
720 if (i == gpt_head->num_partition_entries) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +0900721 pr_err("More partitions than allowed!\n");
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100722 return -1;
723 }
724
725 /* Check if GPT and ENV partition names match */
726 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
727 PARTNAME_SZ + 1);
728
729 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
730 __func__, i, efi_str, partitions[i].name);
731
732 if (strncmp(efi_str, (char *)partitions[i].name,
733 sizeof(partitions->name))) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +0900734 pr_err("Partition name: %s does not match %s!\n",
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100735 efi_str, (char *)partitions[i].name);
736 return -1;
737 }
738
739 /* Check if GPT and ENV sizes match */
740 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
741 le64_to_cpu(gpt_e[i].starting_lba) + 1;
742 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
Simon Glassf8d61652016-02-29 15:25:36 -0700743 (unsigned long long)gpt_part_size,
744 (unsigned long long)partitions[i].size);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100745
746 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
Kever Yangc2fdd342016-07-29 11:12:18 +0800747 /* We do not check the extend partition size */
748 if ((i == parts - 1) && (partitions[i].size == 0))
749 continue;
750
Masahiro Yamada9b643e32017-09-16 14:10:41 +0900751 pr_err("Partition %s size: %llu does not match %llu!\n",
Simon Glassf8d61652016-02-29 15:25:36 -0700752 efi_str, (unsigned long long)gpt_part_size,
753 (unsigned long long)partitions[i].size);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100754 return -1;
755 }
756
757 /*
758 * Start address is optional - check only if provided
759 * in '$partition' variable
760 */
761 if (!partitions[i].start) {
762 debug("\n");
763 continue;
764 }
765
766 /* Check if GPT and ENV start LBAs match */
767 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
768 le64_to_cpu(gpt_e[i].starting_lba),
Simon Glassf8d61652016-02-29 15:25:36 -0700769 (unsigned long long)partitions[i].start);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100770
771 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
Masahiro Yamada9b643e32017-09-16 14:10:41 +0900772 pr_err("Partition %s start: %llu does not match %llu!\n",
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100773 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
Simon Glassf8d61652016-02-29 15:25:36 -0700774 (unsigned long long)partitions[i].start);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100775 return -1;
776 }
777 }
778
779 return 0;
780}
781
Simon Glass4101f682016-02-29 15:25:34 -0700782int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
Steve Rae0ff7e582014-12-12 15:51:54 -0800783{
784 gpt_header *gpt_h;
785 gpt_entry *gpt_e;
786
787 /* determine start of GPT Header in the buffer */
788 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
789 dev_desc->blksz);
790 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
791 dev_desc->lba))
792 return -1;
793
794 /* determine start of GPT Entries in the buffer */
795 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
796 dev_desc->blksz);
797 if (validate_gpt_entries(gpt_h, gpt_e))
798 return -1;
799
800 return 0;
801}
802
Simon Glass4101f682016-02-29 15:25:34 -0700803int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
Steve Rae0ff7e582014-12-12 15:51:54 -0800804{
805 gpt_header *gpt_h;
806 gpt_entry *gpt_e;
807 int gpt_e_blk_cnt;
808 lbaint_t lba;
809 int cnt;
810
811 if (is_valid_gpt_buf(dev_desc, buf))
812 return -1;
813
814 /* determine start of GPT Header in the buffer */
815 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
816 dev_desc->blksz);
817
818 /* determine start of GPT Entries in the buffer */
819 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
820 dev_desc->blksz);
821 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
822 le32_to_cpu(gpt_h->sizeof_partition_entry)),
823 dev_desc);
824
825 /* write MBR */
826 lba = 0; /* MBR is always at 0 */
827 cnt = 1; /* MBR (1 block) */
Simon Glass2a981dc2016-02-29 15:25:52 -0700828 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800829 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
830 __func__, "MBR", cnt, lba);
831 return 1;
832 }
833
834 /* write Primary GPT */
835 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
836 cnt = 1; /* GPT Header (1 block) */
Simon Glass2a981dc2016-02-29 15:25:52 -0700837 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800838 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
839 __func__, "Primary GPT Header", cnt, lba);
840 return 1;
841 }
842
843 lba = le64_to_cpu(gpt_h->partition_entry_lba);
844 cnt = gpt_e_blk_cnt;
Simon Glass2a981dc2016-02-29 15:25:52 -0700845 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800846 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
847 __func__, "Primary GPT Entries", cnt, lba);
848 return 1;
849 }
850
851 prepare_backup_gpt_header(gpt_h);
852
853 /* write Backup GPT */
854 lba = le64_to_cpu(gpt_h->partition_entry_lba);
855 cnt = gpt_e_blk_cnt;
Simon Glass2a981dc2016-02-29 15:25:52 -0700856 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800857 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
858 __func__, "Backup GPT Entries", cnt, lba);
859 return 1;
860 }
861
862 lba = le64_to_cpu(gpt_h->my_lba);
863 cnt = 1; /* GPT Header (1 block) */
Simon Glass2a981dc2016-02-29 15:25:52 -0700864 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800865 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
866 __func__, "Backup GPT Header", cnt, lba);
867 return 1;
868 }
869
870 return 0;
871}
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100872#endif
873
richardretanubun07f3d782008-09-26 11:13:22 -0400874/*
875 * Private functions
876 */
877/*
878 * pmbr_part_valid(): Check for EFI partition signature
879 *
880 * Returns: 1 if EFI GPT partition type is found.
881 */
882static int pmbr_part_valid(struct partition *part)
883{
884 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
Marc Dietrich8faefad2013-03-29 07:57:10 +0000885 get_unaligned_le32(&part->start_sect) == 1UL) {
richardretanubun07f3d782008-09-26 11:13:22 -0400886 return 1;
887 }
888
889 return 0;
890}
891
892/*
893 * is_pmbr_valid(): test Protective MBR for validity
894 *
895 * Returns: 1 if PMBR is valid, 0 otherwise.
896 * Validity depends on two things:
897 * 1) MSDOS signature is in the last two bytes of the MBR
898 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
899 */
900static int is_pmbr_valid(legacy_mbr * mbr)
901{
902 int i = 0;
903
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100904 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
richardretanubun07f3d782008-09-26 11:13:22 -0400905 return 0;
richardretanubun07f3d782008-09-26 11:13:22 -0400906
907 for (i = 0; i < 4; i++) {
908 if (pmbr_part_valid(&mbr->partition_record[i])) {
909 return 1;
910 }
911 }
912 return 0;
913}
914
915/**
916 * is_gpt_valid() - tests one GPT header and PTEs for validity
917 *
918 * lba is the logical block address of the GPT header to test
919 * gpt is a GPT header ptr, filled on return.
920 * ptes is a PTEs ptr, filled on return.
921 *
922 * Description: returns 1 if valid, 0 on error.
923 * If valid, returns pointers to PTEs.
924 */
Simon Glass4101f682016-02-29 15:25:34 -0700925static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
Steve Raee04350d2014-05-26 11:52:23 -0700926 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
richardretanubun07f3d782008-09-26 11:13:22 -0400927{
Tom Rinib351ccf2017-10-03 09:38:44 -0400928 /* Confirm valid arguments prior to allocation. */
richardretanubun07f3d782008-09-26 11:13:22 -0400929 if (!dev_desc || !pgpt_head) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000930 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400931 return 0;
932 }
933
Patrick Delaunay3cc56612017-11-17 10:08:18 +0100934 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, mbr, 1, dev_desc->blksz);
Tom Rinib351ccf2017-10-03 09:38:44 -0400935
Peter Jonesff98cb92017-09-13 18:05:25 -0400936 /* Read MBR Header from device */
937 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1) {
938 printf("*** ERROR: Can't read MBR header ***\n");
939 return 0;
940 }
941
richardretanubun07f3d782008-09-26 11:13:22 -0400942 /* Read GPT Header from device */
Simon Glass2a981dc2016-02-29 15:25:52 -0700943 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
richardretanubun07f3d782008-09-26 11:13:22 -0400944 printf("*** ERROR: Can't read GPT header ***\n");
945 return 0;
946 }
947
Steve Raee1f6b0a2014-12-18 12:13:42 +0100948 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
richardretanubun07f3d782008-09-26 11:13:22 -0400949 return 0;
richardretanubun07f3d782008-09-26 11:13:22 -0400950
Peter Jonesff98cb92017-09-13 18:05:25 -0400951 if (dev_desc->sig_type == SIG_TYPE_NONE) {
952 efi_guid_t empty = {};
953 if (memcmp(&pgpt_head->disk_guid, &empty, sizeof(empty))) {
954 dev_desc->sig_type = SIG_TYPE_GUID;
955 memcpy(&dev_desc->guid_sig, &pgpt_head->disk_guid,
956 sizeof(empty));
957 } else if (mbr->unique_mbr_signature != 0) {
958 dev_desc->sig_type = SIG_TYPE_MBR;
959 dev_desc->mbr_sig = mbr->unique_mbr_signature;
960 }
961 }
962
richardretanubun07f3d782008-09-26 11:13:22 -0400963 /* Read and allocate Partition Table Entries */
964 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
965 if (*pgpt_pte == NULL) {
966 printf("GPT: Failed to allocate memory for PTE\n");
967 return 0;
968 }
969
Steve Raee1f6b0a2014-12-18 12:13:42 +0100970 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
Doug Andersondeb5ca82011-10-19 09:47:31 +0000971 free(*pgpt_pte);
richardretanubun07f3d782008-09-26 11:13:22 -0400972 return 0;
973 }
974
975 /* We're done, all's well */
976 return 1;
977}
978
979/**
980 * alloc_read_gpt_entries(): reads partition entries from disk
981 * @dev_desc
982 * @gpt - GPT header
983 *
984 * Description: Returns ptes on success, NULL on error.
985 * Allocates space for PTEs based on information found in @gpt.
986 * Notes: remember to free pte when you're done!
987 */
Simon Glass4101f682016-02-29 15:25:34 -0700988static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
989 gpt_header *pgpt_head)
richardretanubun07f3d782008-09-26 11:13:22 -0400990{
Egbert Eichae1768a2013-04-09 06:03:36 +0000991 size_t count = 0, blk_cnt;
Stephen Warren7c4213f2015-12-07 11:38:48 -0700992 lbaint_t blk;
richardretanubun07f3d782008-09-26 11:13:22 -0400993 gpt_entry *pte = NULL;
994
995 if (!dev_desc || !pgpt_head) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000996 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400997 return NULL;
998 }
999
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +01001000 count = le32_to_cpu(pgpt_head->num_partition_entries) *
1001 le32_to_cpu(pgpt_head->sizeof_partition_entry);
richardretanubun07f3d782008-09-26 11:13:22 -04001002
Simon Glass5afb8d12016-07-22 09:22:47 -06001003 debug("%s: count = %u * %u = %lu\n", __func__,
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +01001004 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
Simon Glass5afb8d12016-07-22 09:22:47 -06001005 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
1006 (ulong)count);
richardretanubun07f3d782008-09-26 11:13:22 -04001007
1008 /* Allocate memory for PTE, remember to FREE */
1009 if (count != 0) {
Egbert Eichae1768a2013-04-09 06:03:36 +00001010 pte = memalign(ARCH_DMA_MINALIGN,
1011 PAD_TO_BLOCKSIZE(count, dev_desc));
richardretanubun07f3d782008-09-26 11:13:22 -04001012 }
1013
1014 if (count == 0 || pte == NULL) {
Simon Glass5afb8d12016-07-22 09:22:47 -06001015 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
1016 __func__, (ulong)count);
richardretanubun07f3d782008-09-26 11:13:22 -04001017 return NULL;
1018 }
1019
1020 /* Read GPT Entries from device */
Stephen Warren7c4213f2015-12-07 11:38:48 -07001021 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
Egbert Eichae1768a2013-04-09 06:03:36 +00001022 blk_cnt = BLOCK_CNT(count, dev_desc);
Simon Glass2a981dc2016-02-29 15:25:52 -07001023 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
richardretanubun07f3d782008-09-26 11:13:22 -04001024 printf("*** ERROR: Can't read GPT Entries ***\n");
1025 free(pte);
1026 return NULL;
1027 }
1028 return pte;
1029}
1030
1031/**
1032 * is_pte_valid(): validates a single Partition Table Entry
1033 * @gpt_entry - Pointer to a single Partition Table Entry
1034 *
1035 * Description: returns 1 if valid, 0 on error.
1036 */
1037static int is_pte_valid(gpt_entry * pte)
1038{
1039 efi_guid_t unused_guid;
1040
1041 if (!pte) {
Doug Andersondf70b1c2011-10-19 08:04:46 +00001042 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -04001043 return 0;
1044 }
1045
1046 /* Only one validation for now:
1047 * The GUID Partition Type != Unused Entry (ALL-ZERO)
1048 */
1049 memset(unused_guid.b, 0, sizeof(unused_guid.b));
1050
1051 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
1052 sizeof(unused_guid.b)) == 0) {
1053
Doug Andersondf70b1c2011-10-19 08:04:46 +00001054 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
Taylor Hutt9936be32012-10-12 14:26:09 +00001055 (unsigned int)(uintptr_t)pte);
richardretanubun07f3d782008-09-26 11:13:22 -04001056
1057 return 0;
1058 } else {
1059 return 1;
1060 }
1061}
Simon Glass96e5b032016-02-29 15:25:47 -07001062
1063/*
1064 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
1065 * check EFI first, since a DOS partition is often used as a 'protective MBR'
1066 * with EFI.
1067 */
1068U_BOOT_PART_TYPE(a_efi) = {
1069 .name = "EFI",
1070 .part_type = PART_TYPE_EFI,
Petr Kulhavy87b85302016-09-09 10:27:15 +02001071 .max_entries = GPT_ENTRY_NUMBERS,
Simon Glass3e8bd462016-02-29 15:25:48 -07001072 .get_info = part_get_info_ptr(part_get_info_efi),
Simon Glass084bf4c2016-02-29 15:26:04 -07001073 .print = part_print_ptr(part_print_efi),
1074 .test = part_test_efi,
Simon Glass96e5b032016-02-29 15:25:47 -07001075};
richardretanubun07f3d782008-09-26 11:13:22 -04001076#endif