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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
Simon Glass084bf4c2016-02-29 15:26:04 -0700181void part_print_efi(struct blk_desc *dev_desc)
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000182{
Egbert Eichae1768a2013-04-09 06:03:36 +0000183 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000184 gpt_entry *gpt_pte = NULL;
185 int i = 0;
186 char uuid[37];
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200187 unsigned char *uuid_bin;
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000188
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000189 /* This function validates AND fills in the GPT header and PTE */
190 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
191 gpt_head, &gpt_pte) != 1) {
192 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
Steve Raeae95fad2014-05-05 13:00:08 -0700193 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
194 gpt_head, &gpt_pte) != 1) {
195 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
196 __func__);
197 return;
198 } else {
199 printf("%s: *** Using Backup GPT ***\n",
200 __func__);
201 }
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000202 }
203
204 debug("%s: gpt-entry at %p\n", __func__, gpt_pte);
205
206 printf("Part\tStart LBA\tEnd LBA\t\tName\n");
Stephen Warren13bf2f52012-10-08 08:14:36 +0000207 printf("\tAttributes\n");
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200208 printf("\tType GUID\n");
209 printf("\tPartition GUID\n");
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000210
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100211 for (i = 0; i < le32_to_cpu(gpt_head->num_partition_entries); i++) {
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000212 /* Stop at the first non valid PTE */
213 if (!is_pte_valid(&gpt_pte[i]))
214 break;
215
216 printf("%3d\t0x%08llx\t0x%08llx\t\"%s\"\n", (i + 1),
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100217 le64_to_cpu(gpt_pte[i].starting_lba),
218 le64_to_cpu(gpt_pte[i].ending_lba),
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000219 print_efiname(&gpt_pte[i]));
Stephen Warren13bf2f52012-10-08 08:14:36 +0000220 printf("\tattrs:\t0x%016llx\n", gpt_pte[i].attributes.raw);
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200221 uuid_bin = (unsigned char *)gpt_pte[i].partition_type_guid.b;
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200222 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000223 printf("\ttype:\t%s\n", uuid);
Patrick Delaunaybcb41dc2015-10-27 11:00:28 +0100224#ifdef CONFIG_PARTITION_TYPE_GUID
225 if (!uuid_guid_get_str(uuid_bin, uuid))
226 printf("\ttype:\t%s\n", uuid);
227#endif
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200228 uuid_bin = (unsigned char *)gpt_pte[i].unique_partition_guid.b;
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200229 uuid_bin_to_str(uuid_bin, uuid, UUID_STR_FORMAT_GUID);
230 printf("\tguid:\t%s\n", uuid);
Stephen Warrenf07cd2c2012-10-08 08:14:34 +0000231 }
232
233 /* Remember to free pte */
234 free(gpt_pte);
235 return;
236}
Stephen Warren894bfbb2012-09-21 09:50:59 +0000237
Simon Glass3e8bd462016-02-29 15:25:48 -0700238int part_get_info_efi(struct blk_desc *dev_desc, int part,
239 disk_partition_t *info)
richardretanubun07f3d782008-09-26 11:13:22 -0400240{
Egbert Eichae1768a2013-04-09 06:03:36 +0000241 ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
Doug Andersondeb5ca82011-10-19 09:47:31 +0000242 gpt_entry *gpt_pte = NULL;
richardretanubun07f3d782008-09-26 11:13:22 -0400243
244 /* "part" argument must be at least 1 */
Simon Glass4708a072016-03-16 07:45:36 -0600245 if (part < 1) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000246 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400247 return -1;
248 }
249
250 /* This function validates AND fills in the GPT header and PTE */
251 if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
Stephen Warren4715a812011-10-28 09:21:46 +0000252 gpt_head, &gpt_pte) != 1) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000253 printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
Steve Raeae95fad2014-05-05 13:00:08 -0700254 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
255 gpt_head, &gpt_pte) != 1) {
256 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
257 __func__);
258 return -1;
259 } else {
260 printf("%s: *** Using Backup GPT ***\n",
261 __func__);
262 }
richardretanubun07f3d782008-09-26 11:13:22 -0400263 }
264
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100265 if (part > le32_to_cpu(gpt_head->num_partition_entries) ||
Stephen Warrenc04d68c2012-09-21 09:50:58 +0000266 !is_pte_valid(&gpt_pte[part - 1])) {
Mark Langsdorf6d2ee5a2013-09-10 15:14:56 -0500267 debug("%s: *** ERROR: Invalid partition number %d ***\n",
Stephen Warrenc04d68c2012-09-21 09:50:58 +0000268 __func__, part);
Mark Langsdorf6d2ee5a2013-09-10 15:14:56 -0500269 free(gpt_pte);
Stephen Warrenc04d68c2012-09-21 09:50:58 +0000270 return -1;
271 }
272
Steve Raee04350d2014-05-26 11:52:23 -0700273 /* The 'lbaint_t' casting may limit the maximum disk size to 2 TB */
274 info->start = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].starting_lba);
Richard Retanubun50970832009-01-26 08:45:14 -0500275 /* The ending LBA is inclusive, to calculate size, add 1 to it */
Steve Raee04350d2014-05-26 11:52:23 -0700276 info->size = (lbaint_t)le64_to_cpu(gpt_pte[part - 1].ending_lba) + 1
Richard Retanubun50970832009-01-26 08:45:14 -0500277 - info->start;
Egbert Eichae1768a2013-04-09 06:03:36 +0000278 info->blksz = dev_desc->blksz;
richardretanubun07f3d782008-09-26 11:13:22 -0400279
Lei Wen6eecc032011-09-07 18:11:19 +0000280 sprintf((char *)info->name, "%s",
Doug Andersondeb5ca82011-10-19 09:47:31 +0000281 print_efiname(&gpt_pte[part - 1]));
Ben Whitten192bc692015-12-30 13:05:58 +0000282 strcpy((char *)info->type, "U-Boot");
Stephen Warrenb4414f42012-10-08 08:14:37 +0000283 info->bootable = is_bootable(&gpt_pte[part - 1]);
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100284#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200285 uuid_bin_to_str(gpt_pte[part - 1].unique_partition_guid.b, info->uuid,
286 UUID_STR_FORMAT_GUID);
Stephen Warren894bfbb2012-09-21 09:50:59 +0000287#endif
Patrick Delaunay7561b252015-10-27 11:00:27 +0100288#ifdef CONFIG_PARTITION_TYPE_GUID
289 uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
290 info->type_guid, UUID_STR_FORMAT_GUID);
291#endif
richardretanubun07f3d782008-09-26 11:13:22 -0400292
Steve Rae60bf9412014-05-26 11:52:24 -0700293 debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
Frederic Leroy04735e92013-06-26 18:11:25 +0200294 info->start, info->size, info->name);
richardretanubun07f3d782008-09-26 11:13:22 -0400295
296 /* Remember to free pte */
Doug Andersondeb5ca82011-10-19 09:47:31 +0000297 free(gpt_pte);
richardretanubun07f3d782008-09-26 11:13:22 -0400298 return 0;
299}
300
Simon Glass084bf4c2016-02-29 15:26:04 -0700301static int part_test_efi(struct blk_desc *dev_desc)
richardretanubun07f3d782008-09-26 11:13:22 -0400302{
Egbert Eichae1768a2013-04-09 06:03:36 +0000303 ALLOC_CACHE_ALIGN_BUFFER_PAD(legacy_mbr, legacymbr, 1, dev_desc->blksz);
richardretanubun07f3d782008-09-26 11:13:22 -0400304
305 /* Read legacy MBR from block 0 and validate it */
Simon Glass2a981dc2016-02-29 15:25:52 -0700306 if ((blk_dread(dev_desc, 0, 1, (ulong *)legacymbr) != 1)
Anton staaff75dd582011-10-12 13:56:04 +0000307 || (is_pmbr_valid(legacymbr) != 1)) {
richardretanubun07f3d782008-09-26 11:13:22 -0400308 return -1;
309 }
310 return 0;
311}
312
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100313/**
314 * set_protective_mbr(): Set the EFI protective MBR
315 * @param dev_desc - block device descriptor
316 *
317 * @return - zero on success, otherwise error
318 */
Simon Glass4101f682016-02-29 15:25:34 -0700319static int set_protective_mbr(struct blk_desc *dev_desc)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100320{
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100321 /* Setup the Protective MBR */
Hector Palacios61fcc7d2014-02-13 09:48:24 +0100322 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, p_mbr, 1);
323 memset(p_mbr, 0, sizeof(*p_mbr));
324
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100325 if (p_mbr == NULL) {
326 printf("%s: calloc failed!\n", __func__);
327 return -1;
328 }
Vincent Tinellie163a932017-01-30 15:46:07 +0300329
330 /* Read MBR to backup boot code if it exists */
331 if (blk_dread(dev_desc, 0, 1, p_mbr) != 1) {
332 error("** Can't read from device %d **\n", dev_desc->devnum);
333 return -1;
334 }
335
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100336 /* Append signature */
337 p_mbr->signature = MSDOS_MBR_SIGNATURE;
338 p_mbr->partition_record[0].sys_ind = EFI_PMBR_OSTYPE_EFI_GPT;
339 p_mbr->partition_record[0].start_sect = 1;
Maxime Ripardb349abb2015-01-08 12:26:44 +0100340 p_mbr->partition_record[0].nr_sects = (u32) dev_desc->lba - 1;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100341
342 /* Write MBR sector to the MMC device */
Simon Glass2a981dc2016-02-29 15:25:52 -0700343 if (blk_dwrite(dev_desc, 0, 1, p_mbr) != 1) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100344 printf("** Can't write to device %d **\n",
Simon Glassbcce53d2016-02-29 15:25:51 -0700345 dev_desc->devnum);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100346 return -1;
347 }
348
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100349 return 0;
350}
351
Simon Glass4101f682016-02-29 15:25:34 -0700352int write_gpt_table(struct blk_desc *dev_desc,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100353 gpt_header *gpt_h, gpt_entry *gpt_e)
354{
Egbert Eichae1768a2013-04-09 06:03:36 +0000355 const int pte_blk_cnt = BLOCK_CNT((gpt_h->num_partition_entries
356 * sizeof(gpt_entry)), dev_desc);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100357 u32 calc_crc32;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100358
359 debug("max lba: %x\n", (u32) dev_desc->lba);
360 /* Setup the Protective MBR */
361 if (set_protective_mbr(dev_desc) < 0)
362 goto err;
363
364 /* Generate CRC for the Primary GPT Header */
365 calc_crc32 = efi_crc32((const unsigned char *)gpt_e,
366 le32_to_cpu(gpt_h->num_partition_entries) *
367 le32_to_cpu(gpt_h->sizeof_partition_entry));
368 gpt_h->partition_entry_array_crc32 = cpu_to_le32(calc_crc32);
369
370 calc_crc32 = efi_crc32((const unsigned char *)gpt_h,
371 le32_to_cpu(gpt_h->header_size));
372 gpt_h->header_crc32 = cpu_to_le32(calc_crc32);
373
374 /* Write the First GPT to the block right after the Legacy MBR */
Simon Glass2a981dc2016-02-29 15:25:52 -0700375 if (blk_dwrite(dev_desc, 1, 1, gpt_h) != 1)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100376 goto err;
377
Philipp Tomsich02e43532017-03-01 21:10:39 +0100378 if (blk_dwrite(dev_desc, le64_to_cpu(gpt_h->partition_entry_lba),
379 pte_blk_cnt, gpt_e) != pte_blk_cnt)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100380 goto err;
381
Steve Raee1f6b0a2014-12-18 12:13:42 +0100382 prepare_backup_gpt_header(gpt_h);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100383
Simon Glass2a981dc2016-02-29 15:25:52 -0700384 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->last_usable_lba)
385 + 1, pte_blk_cnt, gpt_e) != pte_blk_cnt)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100386 goto err;
387
Simon Glass2a981dc2016-02-29 15:25:52 -0700388 if (blk_dwrite(dev_desc, (lbaint_t)le64_to_cpu(gpt_h->my_lba), 1,
389 gpt_h) != 1)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100390 goto err;
391
392 debug("GPT successfully written to block device!\n");
393 return 0;
394
395 err:
Simon Glassbcce53d2016-02-29 15:25:51 -0700396 printf("** Can't write to device %d **\n", dev_desc->devnum);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100397 return -1;
398}
399
400int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
401 disk_partition_t *partitions, int parts)
402{
Steve Raee04350d2014-05-26 11:52:23 -0700403 lbaint_t offset = (lbaint_t)le64_to_cpu(gpt_h->first_usable_lba);
404 lbaint_t start;
405 lbaint_t last_usable_lba = (lbaint_t)
406 le64_to_cpu(gpt_h->last_usable_lba);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100407 int i, k;
Marek Vasut67cd4a62013-05-19 12:53:34 +0000408 size_t efiname_len, dosname_len;
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100409#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100410 char *str_uuid;
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200411 unsigned char *bin_uuid;
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100412#endif
Patrick Delaunay7561b252015-10-27 11:00:27 +0100413#ifdef CONFIG_PARTITION_TYPE_GUID
414 char *str_type_guid;
415 unsigned char *bin_type_guid;
416#endif
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100417
418 for (i = 0; i < parts; i++) {
419 /* partition starting lba */
420 start = partitions[i].start;
421 if (start && (start < offset)) {
422 printf("Partition overlap\n");
423 return -1;
424 }
425 if (start) {
426 gpt_e[i].starting_lba = cpu_to_le64(start);
427 offset = start + partitions[i].size;
428 } else {
429 gpt_e[i].starting_lba = cpu_to_le64(offset);
430 offset += partitions[i].size;
431 }
Patrick Delaunaya5653862016-05-02 14:43:33 +0200432 if (offset > (last_usable_lba + 1)) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100433 printf("Partitions layout exceds disk size\n");
434 return -1;
435 }
436 /* partition ending lba */
437 if ((i == parts - 1) && (partitions[i].size == 0))
438 /* extend the last partition to maximuim */
439 gpt_e[i].ending_lba = gpt_h->last_usable_lba;
440 else
441 gpt_e[i].ending_lba = cpu_to_le64(offset - 1);
442
Patrick Delaunay7561b252015-10-27 11:00:27 +0100443#ifdef CONFIG_PARTITION_TYPE_GUID
444 str_type_guid = partitions[i].type_guid;
445 bin_type_guid = gpt_e[i].partition_type_guid.b;
446 if (strlen(str_type_guid)) {
447 if (uuid_str_to_bin(str_type_guid, bin_type_guid,
448 UUID_STR_FORMAT_GUID)) {
449 printf("Partition no. %d: invalid type guid: %s\n",
450 i, str_type_guid);
451 return -1;
452 }
453 } else {
454 /* default partition type GUID */
455 memcpy(bin_type_guid,
456 &PARTITION_BASIC_DATA_GUID, 16);
457 }
458#else
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100459 /* partition type GUID */
460 memcpy(gpt_e[i].partition_type_guid.b,
461 &PARTITION_BASIC_DATA_GUID, 16);
Patrick Delaunay7561b252015-10-27 11:00:27 +0100462#endif
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100463
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100464#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100465 str_uuid = partitions[i].uuid;
Przemyslaw Marczaka96a0e62014-04-02 10:20:02 +0200466 bin_uuid = gpt_e[i].unique_partition_guid.b;
467
Vincent Tinelli9da52f82017-02-27 16:11:15 +0200468 if (uuid_str_to_bin(str_uuid, bin_uuid, UUID_STR_FORMAT_GUID)) {
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100469 printf("Partition no. %d: invalid guid: %s\n",
470 i, str_uuid);
471 return -1;
472 }
473#endif
474
475 /* partition attributes */
476 memset(&gpt_e[i].attributes, 0,
477 sizeof(gpt_entry_attributes));
478
Patrick Delaunaycfdaf4c2015-11-17 11:36:52 +0100479 if (partitions[i].bootable)
480 gpt_e[i].attributes.fields.legacy_bios_bootable = 1;
481
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100482 /* partition name */
Marek Vasut67cd4a62013-05-19 12:53:34 +0000483 efiname_len = sizeof(gpt_e[i].partition_name)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100484 / sizeof(efi_char16_t);
Marek Vasut67cd4a62013-05-19 12:53:34 +0000485 dosname_len = sizeof(partitions[i].name);
486
487 memset(gpt_e[i].partition_name, 0,
488 sizeof(gpt_e[i].partition_name));
489
490 for (k = 0; k < min(dosname_len, efiname_len); k++)
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100491 gpt_e[i].partition_name[k] =
492 (efi_char16_t)(partitions[i].name[k]);
493
Steve Raee04350d2014-05-26 11:52:23 -0700494 debug("%s: name: %s offset[%d]: 0x" LBAF
495 " size[%d]: 0x" LBAF "\n",
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100496 __func__, partitions[i].name, i,
497 offset, i, partitions[i].size);
498 }
499
500 return 0;
501}
502
Philipp Tomsich02e43532017-03-01 21:10:39 +0100503static uint32_t partition_entries_offset(struct blk_desc *dev_desc)
504{
505 uint32_t offset_blks = 2;
506 int __maybe_unused config_offset;
507
508#if defined(CONFIG_EFI_PARTITION_ENTRIES_OFF)
509 /*
510 * Some architectures require their SPL loader at a fixed
511 * address within the first 16KB of the disk. To avoid an
512 * overlap with the partition entries of the EFI partition
513 * table, the first safe offset (in bytes, from the start of
514 * the disk) for the entries can be set in
515 * CONFIG_EFI_PARTITION_ENTRIES_OFF.
516 */
517 offset_blks =
518 PAD_TO_BLOCKSIZE(CONFIG_EFI_PARTITION_ENTRIES_OFF, dev_desc);
519#endif
520
521#if defined(CONFIG_OF_CONTROL)
522 /*
523 * Allow the offset of the first partition entires (in bytes
524 * from the start of the device) to be specified as a property
525 * of the device tree '/config' node.
526 */
527 config_offset = fdtdec_get_config_int(gd->fdt_blob,
528 "u-boot,efi-partition-entries-offset",
529 -EINVAL);
530 if (config_offset != -EINVAL)
531 offset_blks = PAD_TO_BLOCKSIZE(config_offset, dev_desc);
532#endif
533
534 debug("efi: partition entries offset (in blocks): %d\n", offset_blks);
535
536 /*
537 * The earliest LBA this can be at is LBA#2 (i.e. right behind
538 * the (protective) MBR and the GPT header.
539 */
540 if (offset_blks < 2)
541 offset_blks = 2;
542
543 return offset_blks;
544}
545
Simon Glass4101f682016-02-29 15:25:34 -0700546int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100547 char *str_guid, int parts_count)
548{
549 gpt_h->signature = cpu_to_le64(GPT_HEADER_SIGNATURE);
550 gpt_h->revision = cpu_to_le32(GPT_HEADER_REVISION_V1);
551 gpt_h->header_size = cpu_to_le32(sizeof(gpt_header));
552 gpt_h->my_lba = cpu_to_le64(1);
553 gpt_h->alternate_lba = cpu_to_le64(dev_desc->lba - 1);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100554 gpt_h->last_usable_lba = cpu_to_le64(dev_desc->lba - 34);
Philipp Tomsich02e43532017-03-01 21:10:39 +0100555 gpt_h->partition_entry_lba =
556 cpu_to_le64(partition_entries_offset(dev_desc));
557 gpt_h->first_usable_lba =
558 cpu_to_le64(le64_to_cpu(gpt_h->partition_entry_lba) + 32);
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100559 gpt_h->num_partition_entries = cpu_to_le32(GPT_ENTRY_NUMBERS);
560 gpt_h->sizeof_partition_entry = cpu_to_le32(sizeof(gpt_entry));
561 gpt_h->header_crc32 = 0;
562 gpt_h->partition_entry_array_crc32 = 0;
563
Przemyslaw Marczakd718ded2014-04-02 10:20:03 +0200564 if (uuid_str_to_bin(str_guid, gpt_h->disk_guid.b, UUID_STR_FORMAT_GUID))
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100565 return -1;
566
567 return 0;
568}
569
Simon Glass4101f682016-02-29 15:25:34 -0700570int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100571 disk_partition_t *partitions, int parts_count)
572{
573 int ret;
574
Egbert Eichae1768a2013-04-09 06:03:36 +0000575 gpt_header *gpt_h = calloc(1, PAD_TO_BLOCKSIZE(sizeof(gpt_header),
576 dev_desc));
577 gpt_entry *gpt_e;
578
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100579 if (gpt_h == NULL) {
580 printf("%s: calloc failed!\n", __func__);
581 return -1;
582 }
583
Egbert Eichae1768a2013-04-09 06:03:36 +0000584 gpt_e = calloc(1, PAD_TO_BLOCKSIZE(GPT_ENTRY_NUMBERS
585 * sizeof(gpt_entry),
586 dev_desc));
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100587 if (gpt_e == NULL) {
588 printf("%s: calloc failed!\n", __func__);
589 free(gpt_h);
590 return -1;
591 }
592
593 /* Generate Primary GPT header (LBA1) */
594 ret = gpt_fill_header(dev_desc, gpt_h, str_disk_guid, parts_count);
595 if (ret)
596 goto err;
597
598 /* Generate partition entries */
599 ret = gpt_fill_pte(gpt_h, gpt_e, partitions, parts_count);
600 if (ret)
601 goto err;
602
603 /* Write GPT partition table */
604 ret = write_gpt_table(dev_desc, gpt_h, gpt_e);
605
606err:
607 free(gpt_e);
608 free(gpt_h);
609 return ret;
610}
Steve Rae0ff7e582014-12-12 15:51:54 -0800611
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100612static void gpt_convert_efi_name_to_char(char *s, efi_char16_t *es, int n)
613{
614 char *ess = (char *)es;
615 int i, j;
616
617 memset(s, '\0', n);
618
619 for (i = 0, j = 0; j < n; i += 2, j++) {
620 s[j] = ess[i];
621 if (!ess[i])
622 return;
623 }
624}
625
Simon Glass4101f682016-02-29 15:25:34 -0700626int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100627 gpt_entry **gpt_pte)
628{
629 /*
630 * This function validates AND
631 * fills in the GPT header and PTE
632 */
633 if (is_gpt_valid(dev_desc,
634 GPT_PRIMARY_PARTITION_TABLE_LBA,
635 gpt_head, gpt_pte) != 1) {
636 printf("%s: *** ERROR: Invalid GPT ***\n",
637 __func__);
638 return -1;
639 }
640 if (is_gpt_valid(dev_desc, (dev_desc->lba - 1),
641 gpt_head, gpt_pte) != 1) {
642 printf("%s: *** ERROR: Invalid Backup GPT ***\n",
643 __func__);
644 return -1;
645 }
646
647 return 0;
648}
649
Simon Glass4101f682016-02-29 15:25:34 -0700650int gpt_verify_partitions(struct blk_desc *dev_desc,
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100651 disk_partition_t *partitions, int parts,
652 gpt_header *gpt_head, gpt_entry **gpt_pte)
653{
654 char efi_str[PARTNAME_SZ + 1];
655 u64 gpt_part_size;
656 gpt_entry *gpt_e;
657 int ret, i;
658
659 ret = gpt_verify_headers(dev_desc, gpt_head, gpt_pte);
660 if (ret)
661 return ret;
662
663 gpt_e = *gpt_pte;
664
665 for (i = 0; i < parts; i++) {
666 if (i == gpt_head->num_partition_entries) {
667 error("More partitions than allowed!\n");
668 return -1;
669 }
670
671 /* Check if GPT and ENV partition names match */
672 gpt_convert_efi_name_to_char(efi_str, gpt_e[i].partition_name,
673 PARTNAME_SZ + 1);
674
675 debug("%s: part: %2d name - GPT: %16s, ENV: %16s ",
676 __func__, i, efi_str, partitions[i].name);
677
678 if (strncmp(efi_str, (char *)partitions[i].name,
679 sizeof(partitions->name))) {
680 error("Partition name: %s does not match %s!\n",
681 efi_str, (char *)partitions[i].name);
682 return -1;
683 }
684
685 /* Check if GPT and ENV sizes match */
686 gpt_part_size = le64_to_cpu(gpt_e[i].ending_lba) -
687 le64_to_cpu(gpt_e[i].starting_lba) + 1;
688 debug("size(LBA) - GPT: %8llu, ENV: %8llu ",
Simon Glassf8d61652016-02-29 15:25:36 -0700689 (unsigned long long)gpt_part_size,
690 (unsigned long long)partitions[i].size);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100691
692 if (le64_to_cpu(gpt_part_size) != partitions[i].size) {
Kever Yangc2fdd342016-07-29 11:12:18 +0800693 /* We do not check the extend partition size */
694 if ((i == parts - 1) && (partitions[i].size == 0))
695 continue;
696
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100697 error("Partition %s size: %llu does not match %llu!\n",
Simon Glassf8d61652016-02-29 15:25:36 -0700698 efi_str, (unsigned long long)gpt_part_size,
699 (unsigned long long)partitions[i].size);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100700 return -1;
701 }
702
703 /*
704 * Start address is optional - check only if provided
705 * in '$partition' variable
706 */
707 if (!partitions[i].start) {
708 debug("\n");
709 continue;
710 }
711
712 /* Check if GPT and ENV start LBAs match */
713 debug("start LBA - GPT: %8llu, ENV: %8llu\n",
714 le64_to_cpu(gpt_e[i].starting_lba),
Simon Glassf8d61652016-02-29 15:25:36 -0700715 (unsigned long long)partitions[i].start);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100716
717 if (le64_to_cpu(gpt_e[i].starting_lba) != partitions[i].start) {
718 error("Partition %s start: %llu does not match %llu!\n",
719 efi_str, le64_to_cpu(gpt_e[i].starting_lba),
Simon Glassf8d61652016-02-29 15:25:36 -0700720 (unsigned long long)partitions[i].start);
Lukasz Majewskicef68bf2015-11-20 08:06:16 +0100721 return -1;
722 }
723 }
724
725 return 0;
726}
727
Simon Glass4101f682016-02-29 15:25:34 -0700728int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf)
Steve Rae0ff7e582014-12-12 15:51:54 -0800729{
730 gpt_header *gpt_h;
731 gpt_entry *gpt_e;
732
733 /* determine start of GPT Header in the buffer */
734 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
735 dev_desc->blksz);
736 if (validate_gpt_header(gpt_h, GPT_PRIMARY_PARTITION_TABLE_LBA,
737 dev_desc->lba))
738 return -1;
739
740 /* determine start of GPT Entries in the buffer */
741 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
742 dev_desc->blksz);
743 if (validate_gpt_entries(gpt_h, gpt_e))
744 return -1;
745
746 return 0;
747}
748
Simon Glass4101f682016-02-29 15:25:34 -0700749int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf)
Steve Rae0ff7e582014-12-12 15:51:54 -0800750{
751 gpt_header *gpt_h;
752 gpt_entry *gpt_e;
753 int gpt_e_blk_cnt;
754 lbaint_t lba;
755 int cnt;
756
757 if (is_valid_gpt_buf(dev_desc, buf))
758 return -1;
759
760 /* determine start of GPT Header in the buffer */
761 gpt_h = buf + (GPT_PRIMARY_PARTITION_TABLE_LBA *
762 dev_desc->blksz);
763
764 /* determine start of GPT Entries in the buffer */
765 gpt_e = buf + (le64_to_cpu(gpt_h->partition_entry_lba) *
766 dev_desc->blksz);
767 gpt_e_blk_cnt = BLOCK_CNT((le32_to_cpu(gpt_h->num_partition_entries) *
768 le32_to_cpu(gpt_h->sizeof_partition_entry)),
769 dev_desc);
770
771 /* write MBR */
772 lba = 0; /* MBR is always at 0 */
773 cnt = 1; /* MBR (1 block) */
Simon Glass2a981dc2016-02-29 15:25:52 -0700774 if (blk_dwrite(dev_desc, lba, cnt, buf) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800775 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
776 __func__, "MBR", cnt, lba);
777 return 1;
778 }
779
780 /* write Primary GPT */
781 lba = GPT_PRIMARY_PARTITION_TABLE_LBA;
782 cnt = 1; /* GPT Header (1 block) */
Simon Glass2a981dc2016-02-29 15:25:52 -0700783 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800784 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
785 __func__, "Primary GPT Header", cnt, lba);
786 return 1;
787 }
788
789 lba = le64_to_cpu(gpt_h->partition_entry_lba);
790 cnt = gpt_e_blk_cnt;
Simon Glass2a981dc2016-02-29 15:25:52 -0700791 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800792 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
793 __func__, "Primary GPT Entries", cnt, lba);
794 return 1;
795 }
796
797 prepare_backup_gpt_header(gpt_h);
798
799 /* write Backup GPT */
800 lba = le64_to_cpu(gpt_h->partition_entry_lba);
801 cnt = gpt_e_blk_cnt;
Simon Glass2a981dc2016-02-29 15:25:52 -0700802 if (blk_dwrite(dev_desc, lba, cnt, gpt_e) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800803 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
804 __func__, "Backup GPT Entries", cnt, lba);
805 return 1;
806 }
807
808 lba = le64_to_cpu(gpt_h->my_lba);
809 cnt = 1; /* GPT Header (1 block) */
Simon Glass2a981dc2016-02-29 15:25:52 -0700810 if (blk_dwrite(dev_desc, lba, cnt, gpt_h) != cnt) {
Steve Rae0ff7e582014-12-12 15:51:54 -0800811 printf("%s: failed writing '%s' (%d blks at 0x" LBAF ")\n",
812 __func__, "Backup GPT Header", cnt, lba);
813 return 1;
814 }
815
816 return 0;
817}
Lukasz Majewski40684dd2012-12-11 11:09:46 +0100818#endif
819
richardretanubun07f3d782008-09-26 11:13:22 -0400820/*
821 * Private functions
822 */
823/*
824 * pmbr_part_valid(): Check for EFI partition signature
825 *
826 * Returns: 1 if EFI GPT partition type is found.
827 */
828static int pmbr_part_valid(struct partition *part)
829{
830 if (part->sys_ind == EFI_PMBR_OSTYPE_EFI_GPT &&
Marc Dietrich8faefad2013-03-29 07:57:10 +0000831 get_unaligned_le32(&part->start_sect) == 1UL) {
richardretanubun07f3d782008-09-26 11:13:22 -0400832 return 1;
833 }
834
835 return 0;
836}
837
838/*
839 * is_pmbr_valid(): test Protective MBR for validity
840 *
841 * Returns: 1 if PMBR is valid, 0 otherwise.
842 * Validity depends on two things:
843 * 1) MSDOS signature is in the last two bytes of the MBR
844 * 2) One partition of type 0xEE is found, checked by pmbr_part_valid()
845 */
846static int is_pmbr_valid(legacy_mbr * mbr)
847{
848 int i = 0;
849
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100850 if (!mbr || le16_to_cpu(mbr->signature) != MSDOS_MBR_SIGNATURE)
richardretanubun07f3d782008-09-26 11:13:22 -0400851 return 0;
richardretanubun07f3d782008-09-26 11:13:22 -0400852
853 for (i = 0; i < 4; i++) {
854 if (pmbr_part_valid(&mbr->partition_record[i])) {
855 return 1;
856 }
857 }
858 return 0;
859}
860
861/**
862 * is_gpt_valid() - tests one GPT header and PTEs for validity
863 *
864 * lba is the logical block address of the GPT header to test
865 * gpt is a GPT header ptr, filled on return.
866 * ptes is a PTEs ptr, filled on return.
867 *
868 * Description: returns 1 if valid, 0 on error.
869 * If valid, returns pointers to PTEs.
870 */
Simon Glass4101f682016-02-29 15:25:34 -0700871static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
Steve Raee04350d2014-05-26 11:52:23 -0700872 gpt_header *pgpt_head, gpt_entry **pgpt_pte)
richardretanubun07f3d782008-09-26 11:13:22 -0400873{
richardretanubun07f3d782008-09-26 11:13:22 -0400874 if (!dev_desc || !pgpt_head) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000875 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400876 return 0;
877 }
878
879 /* Read GPT Header from device */
Simon Glass2a981dc2016-02-29 15:25:52 -0700880 if (blk_dread(dev_desc, (lbaint_t)lba, 1, pgpt_head) != 1) {
richardretanubun07f3d782008-09-26 11:13:22 -0400881 printf("*** ERROR: Can't read GPT header ***\n");
882 return 0;
883 }
884
Steve Raee1f6b0a2014-12-18 12:13:42 +0100885 if (validate_gpt_header(pgpt_head, (lbaint_t)lba, dev_desc->lba))
richardretanubun07f3d782008-09-26 11:13:22 -0400886 return 0;
richardretanubun07f3d782008-09-26 11:13:22 -0400887
888 /* Read and allocate Partition Table Entries */
889 *pgpt_pte = alloc_read_gpt_entries(dev_desc, pgpt_head);
890 if (*pgpt_pte == NULL) {
891 printf("GPT: Failed to allocate memory for PTE\n");
892 return 0;
893 }
894
Steve Raee1f6b0a2014-12-18 12:13:42 +0100895 if (validate_gpt_entries(pgpt_head, *pgpt_pte)) {
Doug Andersondeb5ca82011-10-19 09:47:31 +0000896 free(*pgpt_pte);
richardretanubun07f3d782008-09-26 11:13:22 -0400897 return 0;
898 }
899
900 /* We're done, all's well */
901 return 1;
902}
903
904/**
905 * alloc_read_gpt_entries(): reads partition entries from disk
906 * @dev_desc
907 * @gpt - GPT header
908 *
909 * Description: Returns ptes on success, NULL on error.
910 * Allocates space for PTEs based on information found in @gpt.
911 * Notes: remember to free pte when you're done!
912 */
Simon Glass4101f682016-02-29 15:25:34 -0700913static gpt_entry *alloc_read_gpt_entries(struct blk_desc *dev_desc,
914 gpt_header *pgpt_head)
richardretanubun07f3d782008-09-26 11:13:22 -0400915{
Egbert Eichae1768a2013-04-09 06:03:36 +0000916 size_t count = 0, blk_cnt;
Stephen Warren7c4213f2015-12-07 11:38:48 -0700917 lbaint_t blk;
richardretanubun07f3d782008-09-26 11:13:22 -0400918 gpt_entry *pte = NULL;
919
920 if (!dev_desc || !pgpt_head) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000921 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400922 return NULL;
923 }
924
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100925 count = le32_to_cpu(pgpt_head->num_partition_entries) *
926 le32_to_cpu(pgpt_head->sizeof_partition_entry);
richardretanubun07f3d782008-09-26 11:13:22 -0400927
Simon Glass5afb8d12016-07-22 09:22:47 -0600928 debug("%s: count = %u * %u = %lu\n", __func__,
Chang Hyun Parkfae2bf22012-12-11 11:09:45 +0100929 (u32) le32_to_cpu(pgpt_head->num_partition_entries),
Simon Glass5afb8d12016-07-22 09:22:47 -0600930 (u32) le32_to_cpu(pgpt_head->sizeof_partition_entry),
931 (ulong)count);
richardretanubun07f3d782008-09-26 11:13:22 -0400932
933 /* Allocate memory for PTE, remember to FREE */
934 if (count != 0) {
Egbert Eichae1768a2013-04-09 06:03:36 +0000935 pte = memalign(ARCH_DMA_MINALIGN,
936 PAD_TO_BLOCKSIZE(count, dev_desc));
richardretanubun07f3d782008-09-26 11:13:22 -0400937 }
938
939 if (count == 0 || pte == NULL) {
Simon Glass5afb8d12016-07-22 09:22:47 -0600940 printf("%s: ERROR: Can't allocate %#lX bytes for GPT Entries\n",
941 __func__, (ulong)count);
richardretanubun07f3d782008-09-26 11:13:22 -0400942 return NULL;
943 }
944
945 /* Read GPT Entries from device */
Stephen Warren7c4213f2015-12-07 11:38:48 -0700946 blk = le64_to_cpu(pgpt_head->partition_entry_lba);
Egbert Eichae1768a2013-04-09 06:03:36 +0000947 blk_cnt = BLOCK_CNT(count, dev_desc);
Simon Glass2a981dc2016-02-29 15:25:52 -0700948 if (blk_dread(dev_desc, blk, (lbaint_t)blk_cnt, pte) != blk_cnt) {
richardretanubun07f3d782008-09-26 11:13:22 -0400949 printf("*** ERROR: Can't read GPT Entries ***\n");
950 free(pte);
951 return NULL;
952 }
953 return pte;
954}
955
956/**
957 * is_pte_valid(): validates a single Partition Table Entry
958 * @gpt_entry - Pointer to a single Partition Table Entry
959 *
960 * Description: returns 1 if valid, 0 on error.
961 */
962static int is_pte_valid(gpt_entry * pte)
963{
964 efi_guid_t unused_guid;
965
966 if (!pte) {
Doug Andersondf70b1c2011-10-19 08:04:46 +0000967 printf("%s: Invalid Argument(s)\n", __func__);
richardretanubun07f3d782008-09-26 11:13:22 -0400968 return 0;
969 }
970
971 /* Only one validation for now:
972 * The GUID Partition Type != Unused Entry (ALL-ZERO)
973 */
974 memset(unused_guid.b, 0, sizeof(unused_guid.b));
975
976 if (memcmp(pte->partition_type_guid.b, unused_guid.b,
977 sizeof(unused_guid.b)) == 0) {
978
Doug Andersondf70b1c2011-10-19 08:04:46 +0000979 debug("%s: Found an unused PTE GUID at 0x%08X\n", __func__,
Taylor Hutt9936be32012-10-12 14:26:09 +0000980 (unsigned int)(uintptr_t)pte);
richardretanubun07f3d782008-09-26 11:13:22 -0400981
982 return 0;
983 } else {
984 return 1;
985 }
986}
Simon Glass96e5b032016-02-29 15:25:47 -0700987
988/*
989 * Add an 'a_' prefix so it comes before 'dos' in the linker list. We need to
990 * check EFI first, since a DOS partition is often used as a 'protective MBR'
991 * with EFI.
992 */
993U_BOOT_PART_TYPE(a_efi) = {
994 .name = "EFI",
995 .part_type = PART_TYPE_EFI,
Petr Kulhavy87b85302016-09-09 10:27:15 +0200996 .max_entries = GPT_ENTRY_NUMBERS,
Simon Glass3e8bd462016-02-29 15:25:48 -0700997 .get_info = part_get_info_ptr(part_get_info_efi),
Simon Glass084bf4c2016-02-29 15:26:04 -0700998 .print = part_print_ptr(part_print_efi),
999 .test = part_test_efi,
Simon Glass96e5b032016-02-29 15:25:47 -07001000};
richardretanubun07f3d782008-09-26 11:13:22 -04001001#endif