Channagoud Kadabi | f73aa29 | 2013-01-31 16:55:20 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 2 | |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions are |
| 5 | * met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer in the documentation and/or other materials provided |
| 11 | * with the distribution. |
Channagoud Kadabi | f73aa29 | 2013-01-31 16:55:20 -0800 | [diff] [blame] | 12 | * * Neither the name of The Linux Foundation. nor the names of its |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <stdlib.h> |
| 30 | #include <string.h> |
| 31 | #include "mmc.h" |
| 32 | #include "partition_parser.h" |
| 33 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 34 | static uint32_t mmc_boot_read_gpt(); |
| 35 | static uint32_t mmc_boot_read_mbr(); |
| 36 | static void mbr_fill_name(struct partition_entry *partition_ent, |
| 37 | uint32_t type); |
| 38 | static uint32_t partition_verify_mbr_signature(uint32_t size, |
| 39 | uint8_t *buffer); |
| 40 | static uint32_t mbr_partition_get_type(uint32_t size, uint8_t *partition, |
| 41 | uint32_t *partition_type); |
| 42 | |
| 43 | static uint32_t partition_get_type(uint32_t size, uint8_t *partition, |
| 44 | uint32_t *partition_type); |
| 45 | static uint32_t partition_parse_gpt_header(uint8_t *buffer, |
| 46 | uint64_t *first_usable_lba, |
| 47 | uint32_t *partition_entry_size, |
| 48 | uint32_t *header_size, |
| 49 | uint32_t *max_partition_count); |
| 50 | |
| 51 | static uint32_t write_mbr(uint32_t, uint8_t *mbrImage); |
| 52 | static uint32_t write_gpt(uint32_t size, uint8_t *gptImage); |
| 53 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 54 | char *ext3_partitions[] = |
| 55 | { "system", "userdata", "persist", "cache", "tombstones" }; |
| 56 | char *vfat_partitions[] = { "modem", "mdm", "NONE" }; |
| 57 | |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 58 | unsigned int ext3_count = 0; |
| 59 | unsigned int vfat_count = 0; |
| 60 | |
| 61 | struct partition_entry partition_entries[NUM_PARTITIONS]; |
Pavel Nedev | b5ba62d | 2013-07-22 11:57:41 +0300 | [diff] [blame^] | 62 | static unsigned gpt_partitions_exist = 0; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 63 | unsigned partition_count = 0; |
| 64 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 65 | unsigned int partition_read_table() |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 66 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 67 | unsigned int ret; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 68 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 69 | /* Read MBR of the card */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 70 | ret = mmc_boot_read_mbr(); |
| 71 | if (ret) { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 72 | dprintf(CRITICAL, "MMC Boot: MBR read failed!\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 73 | return 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 74 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 75 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 76 | /* Read GPT of the card if exist */ |
| 77 | if (gpt_partitions_exist) { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 78 | ret = mmc_boot_read_gpt(); |
| 79 | if (ret) { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 80 | dprintf(CRITICAL, "MMC Boot: GPT read failed!\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 81 | return 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 82 | } |
| 83 | } |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 84 | return 0; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | /* |
| 88 | * Read MBR from MMC card and fill partition table. |
| 89 | */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 90 | static unsigned int mmc_boot_read_mbr() |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 91 | { |
Channagoud Kadabi | 2af6e36 | 2013-04-19 14:32:22 -0700 | [diff] [blame] | 92 | BUF_DMA_ALIGN(buffer, BLOCK_SIZE); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 93 | unsigned int dtype; |
| 94 | unsigned int dfirstsec; |
| 95 | unsigned int EBR_first_sec; |
| 96 | unsigned int EBR_current_sec; |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 97 | int ret = 0; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 98 | int idx, i; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 99 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 100 | /* Print out the MBR first */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 101 | ret = mmc_read(0, (unsigned int *)buffer, BLOCK_SIZE); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 102 | if (ret) { |
| 103 | dprintf(CRITICAL, "Could not read partition from mmc\n"); |
| 104 | return ret; |
| 105 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 106 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 107 | /* Check to see if signature exists */ |
| 108 | ret = partition_verify_mbr_signature(BLOCK_SIZE, buffer); |
| 109 | if (ret) { |
| 110 | return ret; |
| 111 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 112 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 113 | /* |
| 114 | * Process each of the four partitions in the MBR by reading the table |
| 115 | * information into our mbr table. |
| 116 | */ |
| 117 | partition_count = 0; |
| 118 | idx = TABLE_ENTRY_0; |
| 119 | for (i = 0; i < 4; i++) { |
| 120 | /* Type 0xEE indicates end of MBR and GPT partitions exist */ |
| 121 | dtype = buffer[idx + i * TABLE_ENTRY_SIZE + OFFSET_TYPE]; |
| 122 | if (dtype == MBR_PROTECTED_TYPE) { |
| 123 | gpt_partitions_exist = 1; |
| 124 | return ret; |
| 125 | } |
| 126 | partition_entries[partition_count].dtype = dtype; |
| 127 | partition_entries[partition_count].attribute_flag = |
| 128 | buffer[idx + i * TABLE_ENTRY_SIZE + OFFSET_STATUS]; |
| 129 | partition_entries[partition_count].first_lba = |
| 130 | GET_LWORD_FROM_BYTE(&buffer[idx + |
| 131 | i * TABLE_ENTRY_SIZE + |
| 132 | OFFSET_FIRST_SEC]); |
| 133 | partition_entries[partition_count].size = |
| 134 | GET_LWORD_FROM_BYTE(&buffer[idx + |
| 135 | i * TABLE_ENTRY_SIZE + |
| 136 | OFFSET_SIZE]); |
| 137 | dfirstsec = partition_entries[partition_count].first_lba; |
| 138 | mbr_fill_name(&partition_entries[partition_count], |
| 139 | partition_entries[partition_count].dtype); |
| 140 | partition_count++; |
| 141 | if (partition_count == NUM_PARTITIONS) |
| 142 | return ret; |
| 143 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 144 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 145 | /* See if the last partition is EBR, if not, parsing is done */ |
| 146 | if (dtype != MBR_EBR_TYPE) { |
| 147 | return ret; |
| 148 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 149 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 150 | EBR_first_sec = dfirstsec; |
| 151 | EBR_current_sec = dfirstsec; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 152 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 153 | ret = mmc_read((EBR_first_sec * 512), (unsigned int *)buffer, BLOCK_SIZE); |
| 154 | if (ret) |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 155 | return ret; |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 156 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 157 | /* Loop to parse the EBR */ |
| 158 | for (i = 0;; i++) { |
| 159 | ret = partition_verify_mbr_signature(BLOCK_SIZE, buffer); |
| 160 | if (ret) { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 161 | ret = 0; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 162 | break; |
| 163 | } |
| 164 | partition_entries[partition_count].attribute_flag = |
| 165 | buffer[TABLE_ENTRY_0 + OFFSET_STATUS]; |
| 166 | partition_entries[partition_count].dtype = |
| 167 | buffer[TABLE_ENTRY_0 + OFFSET_TYPE]; |
| 168 | partition_entries[partition_count].first_lba = |
| 169 | GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_0 + |
| 170 | OFFSET_FIRST_SEC]) + |
| 171 | EBR_current_sec; |
| 172 | partition_entries[partition_count].size = |
| 173 | GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_0 + OFFSET_SIZE]); |
| 174 | mbr_fill_name(&(partition_entries[partition_count]), |
| 175 | partition_entries[partition_count].dtype); |
| 176 | partition_count++; |
| 177 | if (partition_count == NUM_PARTITIONS) |
| 178 | return ret; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 179 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 180 | dfirstsec = |
| 181 | GET_LWORD_FROM_BYTE(&buffer |
| 182 | [TABLE_ENTRY_1 + OFFSET_FIRST_SEC]); |
| 183 | if (dfirstsec == 0) { |
| 184 | /* Getting to the end of the EBR tables */ |
| 185 | break; |
| 186 | } |
| 187 | /* More EBR to follow - read in the next EBR sector */ |
| 188 | dprintf(SPEW, "Reading EBR block from 0x%X\n", EBR_first_sec |
| 189 | + dfirstsec); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 190 | ret = mmc_read(((EBR_first_sec + dfirstsec) * 512),(unsigned int *)buffer, |
| 191 | BLOCK_SIZE); |
| 192 | if (ret) |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 193 | return ret; |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 194 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 195 | EBR_current_sec = EBR_first_sec + dfirstsec; |
| 196 | } |
| 197 | return ret; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 198 | } |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 199 | |
| 200 | /* |
| 201 | * Read GPT from MMC and fill partition table |
| 202 | */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 203 | static unsigned int mmc_boot_read_gpt() |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 204 | { |
Channagoud Kadabi | 2af6e36 | 2013-04-19 14:32:22 -0700 | [diff] [blame] | 205 | BUF_DMA_ALIGN(data, BLOCK_SIZE); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 206 | int ret = 0; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 207 | unsigned int header_size; |
| 208 | unsigned long long first_usable_lba; |
| 209 | unsigned long long backup_header_lba; |
Neeti Desai | ce6ad9a | 2012-03-21 18:57:59 -0700 | [diff] [blame] | 210 | unsigned long long card_size_sec; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 211 | unsigned int max_partition_count = 0; |
| 212 | unsigned int partition_entry_size; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 213 | unsigned int i = 0; /* Counter for each 512 block */ |
| 214 | unsigned int j = 0; /* Counter for each 128 entry in the 512 block */ |
| 215 | unsigned int n = 0; /* Counter for UTF-16 -> 8 conversion */ |
| 216 | unsigned char UTF16_name[MAX_GPT_NAME_SIZE]; |
| 217 | /* LBA of first partition -- 1 Block after Protected MBR + 1 for PT */ |
Neeti Desai | ce6ad9a | 2012-03-21 18:57:59 -0700 | [diff] [blame] | 218 | unsigned long long partition_0; |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 219 | uint64_t device_density; |
| 220 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 221 | partition_count = 0; |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 222 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 223 | /* Get the density of the mmc device */ |
| 224 | |
| 225 | device_density = mmc_get_device_capacity(); |
| 226 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 227 | /* Print out the GPT first */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 228 | ret = mmc_read(PROTECTIVE_MBR_SIZE, (unsigned int *)data, BLOCK_SIZE); |
| 229 | if (ret) |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 230 | dprintf(CRITICAL, "GPT: Could not read primary gpt from mmc\n"); |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 231 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 232 | ret = partition_parse_gpt_header(data, &first_usable_lba, |
| 233 | &partition_entry_size, &header_size, |
| 234 | &max_partition_count); |
| 235 | if (ret) { |
| 236 | dprintf(INFO, "GPT: (WARNING) Primary signature invalid\n"); |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 237 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 238 | /* Check the backup gpt */ |
Neeti Desai | ce6ad9a | 2012-03-21 18:57:59 -0700 | [diff] [blame] | 239 | |
| 240 | /* Get size of MMC */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 241 | card_size_sec = (device_density) / BLOCK_SIZE; |
Neeti Desai | ce6ad9a | 2012-03-21 18:57:59 -0700 | [diff] [blame] | 242 | ASSERT (card_size_sec > 0); |
| 243 | |
| 244 | backup_header_lba = card_size_sec - 1; |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 245 | ret = mmc_read((backup_header_lba * BLOCK_SIZE), (unsigned int *)data, |
| 246 | BLOCK_SIZE); |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 247 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 248 | if (ret) { |
| 249 | dprintf(CRITICAL, |
| 250 | "GPT: Could not read backup gpt from mmc\n"); |
| 251 | return ret; |
| 252 | } |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 253 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 254 | ret = partition_parse_gpt_header(data, &first_usable_lba, |
| 255 | &partition_entry_size, |
| 256 | &header_size, |
| 257 | &max_partition_count); |
| 258 | if (ret) { |
| 259 | dprintf(CRITICAL, |
| 260 | "GPT: Primary and backup signatures invalid\n"); |
| 261 | return ret; |
| 262 | } |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 263 | } |
Neeti Desai | ce6ad9a | 2012-03-21 18:57:59 -0700 | [diff] [blame] | 264 | partition_0 = GET_LLWORD_FROM_BYTE(&data[PARTITION_ENTRIES_OFFSET]); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 265 | /* Read GPT Entries */ |
Channagoud Kadabi | 82a482f | 2013-02-14 21:04:38 -0800 | [diff] [blame] | 266 | for (i = 0; i < (ROUNDUP(max_partition_count, 4)) / 4; i++) { |
neetid | 6c38de1 | 2011-12-02 12:04:50 -0800 | [diff] [blame] | 267 | ASSERT(partition_count < NUM_PARTITIONS); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 268 | ret = mmc_read((partition_0 * BLOCK_SIZE) + (i * BLOCK_SIZE), |
| 269 | (uint32_t *) data, BLOCK_SIZE); |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 270 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 271 | if (ret) { |
| 272 | dprintf(CRITICAL, |
| 273 | "GPT: mmc read card failed reading partition entries.\n"); |
| 274 | return ret; |
| 275 | } |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 276 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 277 | for (j = 0; j < 4; j++) { |
| 278 | memcpy(&(partition_entries[partition_count].type_guid), |
| 279 | &data[(j * partition_entry_size)], |
| 280 | PARTITION_TYPE_GUID_SIZE); |
| 281 | if (partition_entries[partition_count].type_guid[0] == |
| 282 | 0x00 |
| 283 | && partition_entries[partition_count]. |
| 284 | type_guid[1] == 0x00) { |
Channagoud Kadabi | f73aa29 | 2013-01-31 16:55:20 -0800 | [diff] [blame] | 285 | i = ROUNDUP(max_partition_count, 4); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 286 | break; |
| 287 | } |
| 288 | memcpy(& |
| 289 | (partition_entries[partition_count]. |
| 290 | unique_partition_guid), |
| 291 | &data[(j * partition_entry_size) + |
| 292 | UNIQUE_GUID_OFFSET], |
| 293 | UNIQUE_PARTITION_GUID_SIZE); |
| 294 | partition_entries[partition_count].first_lba = |
| 295 | GET_LLWORD_FROM_BYTE(&data |
| 296 | [(j * partition_entry_size) + |
| 297 | FIRST_LBA_OFFSET]); |
| 298 | partition_entries[partition_count].last_lba = |
| 299 | GET_LLWORD_FROM_BYTE(&data |
| 300 | [(j * partition_entry_size) + |
| 301 | LAST_LBA_OFFSET]); |
| 302 | partition_entries[partition_count].size = |
| 303 | partition_entries[partition_count].last_lba - |
Neeti Desai | 4b8c1df | 2012-03-21 13:15:14 -0700 | [diff] [blame] | 304 | partition_entries[partition_count].first_lba + 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 305 | partition_entries[partition_count].attribute_flag = |
| 306 | GET_LLWORD_FROM_BYTE(&data |
| 307 | [(j * partition_entry_size) + |
| 308 | ATTRIBUTE_FLAG_OFFSET]); |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 309 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 310 | memset(&UTF16_name, 0x00, MAX_GPT_NAME_SIZE); |
| 311 | memcpy(UTF16_name, &data[(j * partition_entry_size) + |
| 312 | PARTITION_NAME_OFFSET], |
| 313 | MAX_GPT_NAME_SIZE); |
| 314 | /* |
| 315 | * Currently partition names in *.xml are UTF-8 and lowercase |
| 316 | * Only supporting english for now so removing 2nd byte of UTF-16 |
| 317 | */ |
| 318 | for (n = 0; n < MAX_GPT_NAME_SIZE / 2; n++) { |
| 319 | partition_entries[partition_count].name[n] = |
| 320 | UTF16_name[n * 2]; |
| 321 | } |
| 322 | partition_count++; |
| 323 | } |
| 324 | } |
| 325 | return ret; |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 328 | static unsigned int write_mbr_in_blocks(unsigned size, unsigned char *mbrImage) |
| 329 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 330 | unsigned int dtype; |
| 331 | unsigned int dfirstsec; |
| 332 | unsigned int ebrSectorOffset; |
| 333 | unsigned char *ebrImage; |
| 334 | unsigned char *lastAddress; |
| 335 | int idx, i; |
| 336 | unsigned int ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 337 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 338 | /* Write the first block */ |
| 339 | ret = mmc_write(0, BLOCK_SIZE, (unsigned int *)mbrImage); |
| 340 | if (ret) { |
| 341 | dprintf(CRITICAL, "Failed to write mbr partition\n"); |
| 342 | goto end; |
| 343 | } |
| 344 | dprintf(SPEW, "write of first MBR block ok\n"); |
| 345 | /* |
| 346 | Loop through the MBR table to see if there is an EBR. |
| 347 | If found, then figure out where to write the first EBR |
| 348 | */ |
| 349 | idx = TABLE_ENTRY_0; |
| 350 | for (i = 0; i < 4; i++) { |
| 351 | dtype = mbrImage[idx + i * TABLE_ENTRY_SIZE + OFFSET_TYPE]; |
| 352 | if (MBR_EBR_TYPE == dtype) { |
| 353 | dprintf(SPEW, "EBR found.\n"); |
| 354 | break; |
| 355 | } |
| 356 | } |
| 357 | if (MBR_EBR_TYPE != dtype) { |
| 358 | dprintf(SPEW, "No EBR in this image\n"); |
| 359 | goto end; |
| 360 | } |
| 361 | /* EBR exists. Write each EBR block to mmc */ |
| 362 | ebrImage = mbrImage + BLOCK_SIZE; |
| 363 | ebrSectorOffset = |
| 364 | GET_LWORD_FROM_BYTE(&mbrImage |
| 365 | [idx + i * TABLE_ENTRY_SIZE + |
| 366 | OFFSET_FIRST_SEC]); |
| 367 | dfirstsec = 0; |
| 368 | dprintf(SPEW, "first EBR to be written at sector 0x%X\n", dfirstsec); |
| 369 | lastAddress = mbrImage + size; |
| 370 | while (ebrImage < lastAddress) { |
| 371 | dprintf(SPEW, "writing to 0x%X\n", |
| 372 | (ebrSectorOffset + dfirstsec) * BLOCK_SIZE); |
| 373 | ret = |
| 374 | mmc_write((ebrSectorOffset + dfirstsec) * BLOCK_SIZE, |
| 375 | BLOCK_SIZE, (unsigned int *)ebrImage); |
| 376 | if (ret) { |
| 377 | dprintf(CRITICAL, |
| 378 | "Failed to write EBR block to sector 0x%X\n", |
| 379 | dfirstsec); |
| 380 | goto end; |
| 381 | } |
| 382 | dfirstsec = |
| 383 | GET_LWORD_FROM_BYTE(&ebrImage |
| 384 | [TABLE_ENTRY_1 + OFFSET_FIRST_SEC]); |
| 385 | ebrImage += BLOCK_SIZE; |
| 386 | } |
| 387 | dprintf(INFO, "MBR written to mmc successfully\n"); |
| 388 | end: |
| 389 | return ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | /* Write the MBR/EBR to the MMC. */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 393 | static unsigned int write_mbr(unsigned size, unsigned char *mbrImage) |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 394 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 395 | unsigned int ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 396 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 397 | /* Verify that passed in block is a valid MBR */ |
| 398 | ret = partition_verify_mbr_signature(size, mbrImage); |
| 399 | if (ret) { |
| 400 | goto end; |
| 401 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 402 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 403 | /* Write the MBR/EBR to mmc */ |
| 404 | ret = write_mbr_in_blocks(size, mbrImage); |
| 405 | if (ret) { |
| 406 | dprintf(CRITICAL, "Failed to write MBR block to mmc.\n"); |
| 407 | goto end; |
| 408 | } |
| 409 | /* Re-read the MBR partition into mbr table */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 410 | ret = mmc_boot_read_mbr(); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 411 | if (ret) { |
| 412 | dprintf(CRITICAL, "Failed to re-read mbr partition.\n"); |
| 413 | goto end; |
| 414 | } |
| 415 | partition_dump(); |
| 416 | end: |
| 417 | return ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | /* |
| 421 | * A8h reflected is 15h, i.e. 10101000 <--> 00010101 |
| 422 | */ |
| 423 | int reflect(int data, int len) |
| 424 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 425 | int ref = 0; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 426 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 427 | for (int i = 0; i < len; i++) { |
| 428 | if (data & 0x1) { |
| 429 | ref |= (1 << ((len - 1) - i)); |
| 430 | } |
| 431 | data = (data >> 1); |
| 432 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 433 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 434 | return ref; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Function to calculate the CRC32 |
| 439 | */ |
| 440 | unsigned int calculate_crc32(unsigned char *buffer, int len) |
| 441 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 442 | int byte_length = 8; /*length of unit (i.e. byte) */ |
| 443 | int msb = 0; |
| 444 | int polynomial = 0x104C11DB7; /* IEEE 32bit polynomial */ |
| 445 | unsigned int regs = 0xFFFFFFFF; /* init to all ones */ |
| 446 | int regs_mask = 0xFFFFFFFF; /* ensure only 32 bit answer */ |
| 447 | int regs_msb = 0; |
| 448 | unsigned int reflected_regs; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 449 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 450 | for (int i = 0; i < len; i++) { |
| 451 | int data_byte = buffer[i]; |
| 452 | data_byte = reflect(data_byte, 8); |
| 453 | for (int j = 0; j < byte_length; j++) { |
| 454 | msb = data_byte >> (byte_length - 1); /* get MSB */ |
| 455 | msb &= 1; /* ensure just 1 bit */ |
| 456 | regs_msb = (regs >> 31) & 1; /* MSB of regs */ |
| 457 | regs = regs << 1; /* shift regs for CRC-CCITT */ |
| 458 | if (regs_msb ^ msb) { /* MSB is a 1 */ |
| 459 | regs = regs ^ polynomial; /* XOR with generator poly */ |
| 460 | } |
| 461 | regs = regs & regs_mask; /* Mask off excess upper bits */ |
| 462 | data_byte <<= 1; /* get to next bit */ |
| 463 | } |
| 464 | } |
| 465 | regs = regs & regs_mask; |
| 466 | reflected_regs = reflect(regs, 32) ^ 0xFFFFFFFF; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 467 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 468 | return reflected_regs; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Write the GPT Partition Entry Array to the MMC. |
| 473 | */ |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 474 | static unsigned int |
| 475 | write_gpt_partition_array(unsigned char *header, |
| 476 | unsigned int partition_array_start, |
| 477 | unsigned int array_size) |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 478 | { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 479 | unsigned int ret = 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 480 | unsigned long long partition_entry_lba; |
| 481 | unsigned long long partition_entry_array_start_location; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 482 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 483 | partition_entry_lba = |
| 484 | GET_LLWORD_FROM_BYTE(&header[PARTITION_ENTRIES_OFFSET]); |
| 485 | partition_entry_array_start_location = partition_entry_lba * BLOCK_SIZE; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 486 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 487 | ret = mmc_write(partition_entry_array_start_location, array_size, |
| 488 | (unsigned int *)partition_array_start); |
| 489 | if (ret) { |
| 490 | dprintf(CRITICAL, |
| 491 | "GPT: FAILED to write the partition entry array\n"); |
| 492 | goto end; |
| 493 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 494 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 495 | end: |
| 496 | return ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 499 | static void |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 500 | patch_gpt(unsigned char *gptImage, uint64_t density, unsigned int array_size, |
| 501 | unsigned int max_part_count, unsigned int part_entry_size) |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 502 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 503 | unsigned int partition_entry_array_start; |
| 504 | unsigned char *primary_gpt_header; |
| 505 | unsigned char *secondary_gpt_header; |
| 506 | unsigned int offset; |
| 507 | unsigned long long card_size_sec; |
| 508 | int total_part = 0; |
| 509 | unsigned int last_part_offset; |
| 510 | unsigned int crc_value; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 511 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 512 | /* Get size of MMC */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 513 | card_size_sec = (density) / 512; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 514 | /* Working around cap at 4GB */ |
| 515 | if (card_size_sec == 0) { |
| 516 | card_size_sec = 4 * 1024 * 1024 * 2 - 1; |
| 517 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 518 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 519 | /* Patching primary header */ |
| 520 | primary_gpt_header = (gptImage + PROTECTIVE_MBR_SIZE); |
| 521 | PUT_LONG_LONG(primary_gpt_header + BACKUP_HEADER_OFFSET, |
| 522 | ((long long)(card_size_sec - 1))); |
| 523 | PUT_LONG_LONG(primary_gpt_header + LAST_USABLE_LBA_OFFSET, |
| 524 | ((long long)(card_size_sec - 34))); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 525 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 526 | /* Patching backup GPT */ |
| 527 | offset = (2 * array_size); |
| 528 | secondary_gpt_header = offset + BLOCK_SIZE + primary_gpt_header; |
| 529 | PUT_LONG_LONG(secondary_gpt_header + PRIMARY_HEADER_OFFSET, |
| 530 | ((long long)(card_size_sec - 1))); |
| 531 | PUT_LONG_LONG(secondary_gpt_header + LAST_USABLE_LBA_OFFSET, |
| 532 | ((long long)(card_size_sec - 34))); |
| 533 | PUT_LONG_LONG(secondary_gpt_header + PARTITION_ENTRIES_OFFSET, |
| 534 | ((long long)(card_size_sec - 33))); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 535 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 536 | /* Find last partition */ |
| 537 | while (*(primary_gpt_header + BLOCK_SIZE + total_part * ENTRY_SIZE) != |
| 538 | 0) { |
| 539 | total_part++; |
| 540 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 541 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 542 | /* Patching last partition */ |
| 543 | last_part_offset = |
| 544 | (total_part - 1) * ENTRY_SIZE + PARTITION_ENTRY_LAST_LBA; |
| 545 | PUT_LONG_LONG(primary_gpt_header + BLOCK_SIZE + last_part_offset, |
| 546 | (long long)(card_size_sec - 34)); |
| 547 | PUT_LONG_LONG(primary_gpt_header + BLOCK_SIZE + last_part_offset + |
| 548 | array_size, (long long)(card_size_sec - 34)); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 549 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 550 | /* Updating CRC of the Partition entry array in both headers */ |
| 551 | partition_entry_array_start = primary_gpt_header + BLOCK_SIZE; |
| 552 | crc_value = calculate_crc32(partition_entry_array_start, |
| 553 | max_part_count * part_entry_size); |
| 554 | PUT_LONG(primary_gpt_header + PARTITION_CRC_OFFSET, crc_value); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 555 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 556 | crc_value = calculate_crc32(partition_entry_array_start + array_size, |
| 557 | max_part_count * part_entry_size); |
| 558 | PUT_LONG(secondary_gpt_header + PARTITION_CRC_OFFSET, crc_value); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 559 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 560 | /* Clearing CRC fields to calculate */ |
| 561 | PUT_LONG(primary_gpt_header + HEADER_CRC_OFFSET, 0); |
| 562 | crc_value = calculate_crc32(primary_gpt_header, 92); |
| 563 | PUT_LONG(primary_gpt_header + HEADER_CRC_OFFSET, crc_value); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 564 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 565 | PUT_LONG(secondary_gpt_header + HEADER_CRC_OFFSET, 0); |
| 566 | crc_value = (calculate_crc32(secondary_gpt_header, 92)); |
| 567 | PUT_LONG(secondary_gpt_header + HEADER_CRC_OFFSET, crc_value); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 568 | |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Write the GPT to the MMC. |
| 573 | */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 574 | static unsigned int write_gpt(unsigned size, unsigned char *gptImage) |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 575 | { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 576 | unsigned int ret = 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 577 | unsigned int header_size; |
| 578 | unsigned long long first_usable_lba; |
| 579 | unsigned long long backup_header_lba; |
| 580 | unsigned int max_partition_count = 0; |
| 581 | unsigned int partition_entry_size; |
| 582 | unsigned int partition_entry_array_start; |
| 583 | unsigned char *primary_gpt_header; |
| 584 | unsigned char *secondary_gpt_header; |
| 585 | unsigned int offset; |
| 586 | unsigned int partition_entry_array_size; |
| 587 | unsigned long long primary_header_location; /* address on the emmc card */ |
| 588 | unsigned long long secondary_header_location; /* address on the emmc card */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 589 | uint64_t device_density; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 590 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 591 | /* Verify that passed block has a valid GPT primary header */ |
| 592 | primary_gpt_header = (gptImage + PROTECTIVE_MBR_SIZE); |
| 593 | ret = partition_parse_gpt_header(primary_gpt_header, &first_usable_lba, |
| 594 | &partition_entry_size, &header_size, |
| 595 | &max_partition_count); |
| 596 | if (ret) { |
| 597 | dprintf(CRITICAL, |
| 598 | "GPT: Primary signature invalid cannot write GPT\n"); |
| 599 | goto end; |
| 600 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 601 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 602 | /* Get the density of the mmc device */ |
| 603 | |
| 604 | device_density = mmc_get_device_capacity(); |
| 605 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 606 | /* Verify that passed block has a valid backup GPT HEADER */ |
| 607 | partition_entry_array_size = partition_entry_size * max_partition_count; |
| 608 | if (partition_entry_array_size < MIN_PARTITION_ARRAY_SIZE) { |
| 609 | partition_entry_array_size = MIN_PARTITION_ARRAY_SIZE; |
| 610 | } |
| 611 | offset = (2 * partition_entry_array_size); |
| 612 | secondary_gpt_header = offset + BLOCK_SIZE + primary_gpt_header; |
| 613 | ret = |
| 614 | partition_parse_gpt_header(secondary_gpt_header, &first_usable_lba, |
| 615 | &partition_entry_size, &header_size, |
| 616 | &max_partition_count); |
| 617 | if (ret) { |
| 618 | dprintf(CRITICAL, |
| 619 | "GPT: Backup signature invalid cannot write GPT\n"); |
| 620 | goto end; |
| 621 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 622 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 623 | /* Patching the primary and the backup header of the GPT table */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 624 | patch_gpt(gptImage, device_density, partition_entry_array_size, |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 625 | max_partition_count, partition_entry_size); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 626 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 627 | /* Erasing the eMMC card before writing */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 628 | ret = mmc_erase_card(0x00000000, device_density); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 629 | if (ret) { |
| 630 | dprintf(CRITICAL, "Failed to erase the eMMC card\n"); |
| 631 | goto end; |
| 632 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 633 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 634 | /* Writing protective MBR */ |
| 635 | ret = mmc_write(0, PROTECTIVE_MBR_SIZE, (unsigned int *)gptImage); |
| 636 | if (ret) { |
| 637 | dprintf(CRITICAL, "Failed to write Protective MBR\n"); |
| 638 | goto end; |
| 639 | } |
| 640 | /* Writing the primary GPT header */ |
| 641 | primary_header_location = PROTECTIVE_MBR_SIZE; |
| 642 | ret = mmc_write(primary_header_location, BLOCK_SIZE, |
| 643 | (unsigned int *)primary_gpt_header); |
| 644 | if (ret) { |
| 645 | dprintf(CRITICAL, "Failed to write GPT header\n"); |
| 646 | goto end; |
| 647 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 648 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 649 | /* Writing the backup GPT header */ |
| 650 | backup_header_lba = GET_LLWORD_FROM_BYTE |
| 651 | (&primary_gpt_header[BACKUP_HEADER_OFFSET]); |
| 652 | secondary_header_location = backup_header_lba * BLOCK_SIZE; |
| 653 | ret = mmc_write(secondary_header_location, BLOCK_SIZE, |
| 654 | (unsigned int *)secondary_gpt_header); |
| 655 | if (ret) { |
| 656 | dprintf(CRITICAL, "Failed to write GPT backup header\n"); |
| 657 | goto end; |
| 658 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 659 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 660 | /* Writing the partition entries array for the primary header */ |
| 661 | partition_entry_array_start = primary_gpt_header + BLOCK_SIZE; |
| 662 | ret = write_gpt_partition_array(primary_gpt_header, |
| 663 | partition_entry_array_start, |
| 664 | partition_entry_array_size); |
| 665 | if (ret) { |
| 666 | dprintf(CRITICAL, |
| 667 | "GPT: Could not write GPT Partition entries array\n"); |
| 668 | goto end; |
| 669 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 670 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 671 | /*Writing the partition entries array for the backup header */ |
| 672 | partition_entry_array_start = primary_gpt_header + BLOCK_SIZE + |
| 673 | partition_entry_array_size; |
| 674 | ret = write_gpt_partition_array(secondary_gpt_header, |
| 675 | partition_entry_array_start, |
| 676 | partition_entry_array_size); |
| 677 | if (ret) { |
| 678 | dprintf(CRITICAL, |
| 679 | "GPT: Could not write GPT Partition entries array\n"); |
| 680 | goto end; |
| 681 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 682 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 683 | /* Re-read the GPT partition table */ |
| 684 | dprintf(INFO, "Re-reading the GPT Partition Table\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 685 | ret = mmc_boot_read_gpt(); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 686 | if (ret) { |
| 687 | dprintf(CRITICAL, |
| 688 | "GPT: Failure to re- read the GPT Partition table\n"); |
| 689 | goto end; |
| 690 | } |
| 691 | partition_dump(); |
| 692 | dprintf(CRITICAL, "GPT: Partition Table written\n"); |
| 693 | memset(primary_gpt_header, 0x00, size); |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 694 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 695 | end: |
| 696 | return ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 697 | } |
| 698 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 699 | unsigned int write_partition(unsigned size, unsigned char *partition) |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 700 | { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 701 | unsigned int ret = 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 702 | unsigned int partition_type; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 703 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 704 | if (partition == 0) { |
| 705 | dprintf(CRITICAL, "NULL partition\n"); |
| 706 | goto end; |
| 707 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 708 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 709 | ret = partition_get_type(size, partition, &partition_type); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 710 | if (ret) |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 711 | goto end; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 712 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 713 | switch (partition_type) { |
| 714 | case PARTITION_TYPE_MBR: |
| 715 | dprintf(INFO, "Writing MBR partition\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 716 | ret = write_mbr(size, partition); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 717 | break; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 718 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 719 | case PARTITION_TYPE_GPT: |
| 720 | dprintf(INFO, "Writing GPT partition\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 721 | ret = write_gpt(size, partition); |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 722 | dprintf(CRITICAL, "Re-Flash all the partitions\n"); |
| 723 | break; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 724 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 725 | default: |
| 726 | dprintf(CRITICAL, "Invalid partition\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 727 | ret = 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 728 | goto end; |
| 729 | } |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 730 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 731 | end: |
| 732 | return ret; |
Neeti Desai | 5f26aff | 2011-09-30 10:27:40 -0700 | [diff] [blame] | 733 | } |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 734 | |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 735 | /* |
| 736 | * Fill name for android partition found. |
| 737 | */ |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 738 | static void |
| 739 | mbr_fill_name(struct partition_entry *partition_ent, unsigned int type) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 740 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 741 | switch (type) { |
| 742 | memset(partition_ent->name, 0, MAX_GPT_NAME_SIZE); |
| 743 | case MBR_MODEM_TYPE: |
| 744 | case MBR_MODEM_TYPE2: |
| 745 | /* if already assigned last name available then return */ |
| 746 | if (!strcmp((const char *)vfat_partitions[vfat_count], "NONE")) |
| 747 | return; |
| 748 | strlcpy((char *)partition_ent->name, |
| 749 | (const char *)vfat_partitions[vfat_count], |
| 750 | sizeof(partition_ent->name)); |
| 751 | vfat_count++; |
| 752 | break; |
| 753 | case MBR_SBL1_TYPE: |
| 754 | memcpy(partition_ent->name, "sbl1", 4); |
| 755 | break; |
| 756 | case MBR_SBL2_TYPE: |
| 757 | memcpy(partition_ent->name, "sbl2", 4); |
| 758 | break; |
| 759 | case MBR_SBL3_TYPE: |
| 760 | memcpy(partition_ent->name, "sbl3", 4); |
| 761 | break; |
| 762 | case MBR_RPM_TYPE: |
| 763 | memcpy(partition_ent->name, "rpm", 3); |
| 764 | break; |
| 765 | case MBR_TZ_TYPE: |
| 766 | memcpy(partition_ent->name, "tz", 2); |
| 767 | break; |
| 768 | case MBR_ABOOT_TYPE: |
Channagoud Kadabi | 16f5095 | 2012-04-02 16:24:07 +0530 | [diff] [blame] | 769 | #if PLATFORM_MSM7X27A |
| 770 | memcpy(partition_ent->name, "FOTA", 4); |
| 771 | #else |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 772 | memcpy(partition_ent->name, "aboot", 5); |
Channagoud Kadabi | 16f5095 | 2012-04-02 16:24:07 +0530 | [diff] [blame] | 773 | #endif |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 774 | break; |
| 775 | case MBR_BOOT_TYPE: |
| 776 | memcpy(partition_ent->name, "boot", 4); |
| 777 | break; |
| 778 | case MBR_MODEM_ST1_TYPE: |
| 779 | memcpy(partition_ent->name, "modem_st1", 9); |
| 780 | break; |
| 781 | case MBR_MODEM_ST2_TYPE: |
| 782 | memcpy(partition_ent->name, "modem_st2", 9); |
| 783 | break; |
| 784 | case MBR_EFS2_TYPE: |
| 785 | memcpy(partition_ent->name, "efs2", 4); |
| 786 | break; |
| 787 | case MBR_USERDATA_TYPE: |
| 788 | if (ext3_count == sizeof(ext3_partitions) / sizeof(char *)) |
| 789 | return; |
| 790 | strlcpy((char *)partition_ent->name, |
| 791 | (const char *)ext3_partitions[ext3_count], |
| 792 | sizeof(partition_ent->name)); |
| 793 | ext3_count++; |
| 794 | break; |
| 795 | case MBR_RECOVERY_TYPE: |
| 796 | memcpy(partition_ent->name, "recovery", 8); |
| 797 | break; |
| 798 | case MBR_MISC_TYPE: |
| 799 | memcpy(partition_ent->name, "misc", 4); |
| 800 | break; |
Neeti Desai | 2d6b0e4 | 2012-03-23 15:48:57 -0700 | [diff] [blame] | 801 | case MBR_SSD_TYPE: |
| 802 | memcpy(partition_ent->name, "ssd", 3); |
| 803 | break; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 804 | }; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | /* |
| 808 | * Find index of parition in array of partition entries |
| 809 | */ |
Pavel Nedev | 285ad92 | 2013-04-26 10:39:19 +0300 | [diff] [blame] | 810 | int partition_get_index(const char *name) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 811 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 812 | unsigned int input_string_length = strlen(name); |
| 813 | unsigned n; |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 814 | |
neetid | 6c38de1 | 2011-12-02 12:04:50 -0800 | [diff] [blame] | 815 | if( partition_count >= NUM_PARTITIONS) |
| 816 | { |
| 817 | return INVALID_PTN; |
| 818 | } |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 819 | for (n = 0; n < partition_count; n++) { |
| 820 | if (!memcmp |
| 821 | (name, &partition_entries[n].name, input_string_length) |
| 822 | && input_string_length == |
| 823 | strlen((const char *)&partition_entries[n].name)) { |
| 824 | return n; |
| 825 | } |
| 826 | } |
| 827 | return INVALID_PTN; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | /* Get size of the partition */ |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 831 | unsigned long long partition_get_size(int index) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 832 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 833 | if (index == INVALID_PTN) |
| 834 | return 0; |
| 835 | else { |
| 836 | return partition_entries[index].size * BLOCK_SIZE; |
| 837 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | /* Get offset of the partition */ |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 841 | unsigned long long partition_get_offset(int index) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 842 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 843 | if (index == INVALID_PTN) |
| 844 | return 0; |
| 845 | else { |
| 846 | return partition_entries[index].first_lba * BLOCK_SIZE; |
| 847 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | /* Debug: Print all parsed partitions */ |
| 851 | void partition_dump() |
| 852 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 853 | unsigned i = 0; |
| 854 | for (i = 0; i < partition_count; i++) { |
| 855 | dprintf(SPEW, |
| 856 | "ptn[%d]:Name[%s] Size[%llu] Type[%u] First[%llu] Last[%llu]\n", |
| 857 | i, partition_entries[i].name, partition_entries[i].size, |
| 858 | partition_entries[i].dtype, |
| 859 | partition_entries[i].first_lba, |
| 860 | partition_entries[i].last_lba); |
| 861 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 862 | } |
| 863 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 864 | static unsigned int |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 865 | partition_verify_mbr_signature(unsigned size, unsigned char *buffer) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 866 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 867 | /* Avoid checking past end of buffer */ |
| 868 | if ((TABLE_SIGNATURE + 1) > size) { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 869 | return 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 870 | } |
| 871 | /* Check to see if signature exists */ |
| 872 | if ((buffer[TABLE_SIGNATURE] != MMC_MBR_SIGNATURE_BYTE_0) || |
| 873 | (buffer[TABLE_SIGNATURE + 1] != MMC_MBR_SIGNATURE_BYTE_1)) { |
| 874 | dprintf(CRITICAL, "MBR signature does not match.\n"); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 875 | return 1; |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 876 | } |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 877 | return 0; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 878 | } |
| 879 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 880 | static unsigned int |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 881 | mbr_partition_get_type(unsigned size, unsigned char *partition, |
| 882 | unsigned int *partition_type) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 883 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 884 | unsigned int type_offset = TABLE_ENTRY_0 + OFFSET_TYPE; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 885 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 886 | if (size < type_offset) { |
| 887 | goto end; |
| 888 | } |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 889 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 890 | *partition_type = partition[type_offset]; |
| 891 | end: |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 892 | return 0; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 893 | } |
| 894 | |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 895 | static unsigned int |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 896 | partition_get_type(unsigned size, unsigned char *partition, |
| 897 | unsigned int *partition_type) |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 898 | { |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 899 | unsigned int ret = 0; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 900 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 901 | /* |
| 902 | * If the block contains the MBR signature, then it's likely either |
| 903 | * MBR or MBR with protective type (GPT). If the MBR signature is |
| 904 | * not there, then it could be the GPT backup. |
| 905 | */ |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 906 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 907 | /* First check the MBR signature */ |
| 908 | ret = partition_verify_mbr_signature(size, partition); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 909 | if (!ret) { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 910 | unsigned int mbr_partition_type = PARTITION_TYPE_MBR; |
Kinson Chik | f1a4351 | 2011-07-14 11:28:39 -0700 | [diff] [blame] | 911 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 912 | /* MBR signature verified. This could be MBR, MBR + EBR, or GPT */ |
| 913 | ret = |
| 914 | mbr_partition_get_type(size, partition, |
| 915 | &mbr_partition_type); |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 916 | if (ret) { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 917 | dprintf(CRITICAL, "Cannot get TYPE of partition"); |
| 918 | } else if (MBR_PROTECTED_TYPE == mbr_partition_type) { |
| 919 | *partition_type = PARTITION_TYPE_GPT; |
| 920 | } else { |
| 921 | *partition_type = PARTITION_TYPE_MBR; |
| 922 | } |
| 923 | } else { |
| 924 | /* |
| 925 | * This could be the GPT backup. Make that assumption for now. |
| 926 | * Anybody who treats the block as GPT backup should check the |
| 927 | * signature. |
| 928 | */ |
| 929 | *partition_type = PARTITION_TYPE_GPT_BACKUP; |
| 930 | } |
| 931 | return ret; |
Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame] | 932 | } |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 933 | |
| 934 | /* |
| 935 | * Parse the gpt header and get the required header fields |
| 936 | * Return 0 on valid signature |
| 937 | */ |
Channagoud Kadabi | 0e33285 | 2013-04-19 12:55:53 -0700 | [diff] [blame] | 938 | static unsigned int |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 939 | partition_parse_gpt_header(unsigned char *buffer, |
| 940 | unsigned long long *first_usable_lba, |
| 941 | unsigned int *partition_entry_size, |
| 942 | unsigned int *header_size, |
| 943 | unsigned int *max_partition_count) |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 944 | { |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 945 | /* Check GPT Signature */ |
| 946 | if (((uint32_t *) buffer)[0] != GPT_SIGNATURE_2 || |
| 947 | ((uint32_t *) buffer)[1] != GPT_SIGNATURE_1) |
| 948 | return 1; |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 949 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 950 | *header_size = GET_LWORD_FROM_BYTE(&buffer[HEADER_SIZE_OFFSET]); |
| 951 | *first_usable_lba = |
| 952 | GET_LLWORD_FROM_BYTE(&buffer[FIRST_USABLE_LBA_OFFSET]); |
| 953 | *max_partition_count = |
| 954 | GET_LWORD_FROM_BYTE(&buffer[PARTITION_COUNT_OFFSET]); |
| 955 | *partition_entry_size = |
| 956 | GET_LWORD_FROM_BYTE(&buffer[PENTRY_SIZE_OFFSET]); |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 957 | |
Ajay Dudani | b01e506 | 2011-12-03 23:23:42 -0800 | [diff] [blame] | 958 | return 0; |
Kinson Chik | 4d7444f | 2011-09-13 15:48:51 -0700 | [diff] [blame] | 959 | } |
Pavel Nedev | b5ba62d | 2013-07-22 11:57:41 +0300 | [diff] [blame^] | 960 | |
| 961 | bool partition_gpt_exists() |
| 962 | { |
| 963 | return (gpt_partitions_exist != 0); |
| 964 | } |