Kinson Chik | 66552a8 | 2011-03-29 15:59:06 -0700 | [diff] [blame^] | 1 | /* Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| 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. |
| 12 | * * Neither the name of Code Aurora Forum, Inc. nor the names of its |
| 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 | |
| 34 | static struct gpt_entry gpt[NUM_GPT_PARTITIONS]; |
| 35 | static uint32_t gpt_partition_count = 0; |
| 36 | |
| 37 | /* |
| 38 | * Read GPT from MMC and fill partition table |
| 39 | */ |
| 40 | uint32_t mmc_boot_read_gpt(struct mmc_boot_host * mmc_host, |
| 41 | struct mmc_boot_card * mmc_card){ |
| 42 | |
| 43 | int32_t ret = MMC_BOOT_E_SUCCESS; |
| 44 | uint32_t header_size = 0; |
| 45 | //uint32_t header_crc = 0; |
| 46 | uint64_t first_usable_lba = 0; |
| 47 | uint64_t last_usable_lba = 0; |
| 48 | uint32_t partition_count = 0; |
| 49 | uint32_t partition_entry_size = 0; |
| 50 | //uint32_t partition_array_crc; |
| 51 | uint8_t data[MMC_BOOT_RD_BLOCK_LEN]; |
| 52 | uint32_t i = 0; /* Counter for each 512 block */ |
| 53 | uint32_t j = 0; /* Counter for each 128 entry in the 512 block */ |
| 54 | |
| 55 | /* Print out the GPT first */ |
| 56 | ret = mmc_boot_read_from_card( mmc_host, mmc_card, |
| 57 | PROTECTIVE_MBR_SIZE, |
| 58 | MMC_BOOT_RD_BLOCK_LEN, |
| 59 | (uint32_t *)data); |
| 60 | |
| 61 | /* Check GPT Signature */ |
| 62 | if( ((uint32_t *)data)[0] != GPT_SIGNATURE_2 || |
| 63 | ((uint32_t *)data)[1] != GPT_SIGNATURE_1 ) |
| 64 | { |
| 65 | dprintf(CRITICAL, "GPT: signature does not match.\n" ); |
| 66 | return MMC_BOOT_E_FAILURE; |
| 67 | } |
| 68 | |
| 69 | header_size = GET_LWORD_FROM_BYTE(&data[HEADER_SIZE_OFFSET]); |
| 70 | //header_crc = GET_LWORD_FROM_BYTE(&data[HEADER_CRC_OFFSET]); |
| 71 | first_usable_lba = GET_LLWORD_FROM_BYTE(&data[FIRST_USABLE_LBA_OFFSET]); |
| 72 | last_usable_lba = GET_LLWORD_FROM_BYTE(&data[LAST_USABLE_LBA_OFFSET]); |
| 73 | partition_count = GET_LWORD_FROM_BYTE(&data[PARTITION_COUNT_OFFSET]); |
| 74 | partition_entry_size = GET_LWORD_FROM_BYTE(&data[PENTRY_SIZE_OFFSET]); |
| 75 | |
| 76 | /* Read GPT Entries */ |
| 77 | for(i = 0; i < (partition_count/4); i++) |
| 78 | { |
| 79 | ret = mmc_boot_read_from_card( mmc_host, mmc_card, |
| 80 | PROTECTIVE_MBR_SIZE + PARTITION_TABLE_SIZE + |
| 81 | (i * MMC_BOOT_RD_BLOCK_LEN), |
| 82 | MMC_BOOT_RD_BLOCK_LEN, |
| 83 | (uint32_t *)data); |
| 84 | |
| 85 | if (ret) |
| 86 | { |
| 87 | dprintf(CRITICAL, "GPT: mmc read card failed reading partition entries.\n" ); |
| 88 | return ret; |
| 89 | } |
| 90 | |
| 91 | for(j=0; j < 4; j++) |
| 92 | { |
| 93 | memcpy(&(gpt[j+(i*4)].partition_type_guid), |
| 94 | &data[(j * partition_entry_size)], PARTITION_TYPE_GUID_SIZE); |
| 95 | |
| 96 | if (gpt[j+(i*4)].partition_type_guid[0] == 0x00 && |
| 97 | gpt[j+(i*4)].partition_type_guid[1] == 0x00) |
| 98 | { |
| 99 | i = partition_count; |
| 100 | break; |
| 101 | } |
| 102 | gpt_partition_count++; |
| 103 | |
| 104 | memcpy(&(gpt[j+(i*4)].unique_partition_guid), |
| 105 | &data[(j * partition_entry_size) + UNIQUE_GUID_OFFSET], UNIQUE_PARTITION_GUID_SIZE); |
| 106 | gpt[j+(i*4)].first_lba = GET_LLWORD_FROM_BYTE(&data[(j * partition_entry_size) + |
| 107 | FIRST_LBA_OFFSET]); |
| 108 | gpt[j+(i*4)].last_lba = GET_LLWORD_FROM_BYTE(&data[(j * partition_entry_size) + |
| 109 | LAST_LBA_OFFSET]); |
| 110 | gpt[j+(i*4)].attribute_flag = GET_LLWORD_FROM_BYTE(&data[(j * partition_entry_size) + |
| 111 | ATTRIBUTE_FLAG_OFFSET]); |
| 112 | memcpy(&(gpt[j+(i*4)].partition_name), |
| 113 | &data[(j * partition_entry_size) + PARTITION_NAME_OFFSET], MAX_GPT_NAME_SIZE); |
| 114 | } |
| 115 | } |
| 116 | return ret; |
| 117 | } |
| 118 | |
| 119 | uint64_t gpt_lookup(uint8_t * name, unsigned type){ |
| 120 | uint32_t input_string_length = strlen(name); |
| 121 | uint8_t UTF16_name[MAX_GPT_NAME_SIZE]; |
| 122 | unsigned n; |
| 123 | |
| 124 | memset(&UTF16_name, 0x00, MAX_GPT_NAME_SIZE); |
| 125 | /* Currently partition names in partition.xml are UTF-8 and lowercase */ |
| 126 | for(n = 0; n < input_string_length && n < MAX_GPT_NAME_SIZE/2; n++){ |
| 127 | UTF16_name[n*2] = name[n]; |
| 128 | UTF16_name[n*2+1] = 0x00; |
| 129 | } |
| 130 | for(n = 0; n < gpt_partition_count; n++){ |
| 131 | if(!memcmp(&UTF16_name, &gpt[n].partition_name, MAX_GPT_NAME_SIZE)){ |
| 132 | if(type == PTN_SIZE) |
| 133 | return ((uint64_t)(gpt[n].last_lba - gpt[n].first_lba) * MMC_BOOT_RD_BLOCK_LEN); |
| 134 | else if(type == PTN_OFFSET) |
| 135 | return ((uint64_t)gpt[n].first_lba * MMC_BOOT_RD_BLOCK_LEN); |
| 136 | else |
| 137 | return 0; |
| 138 | } |
| 139 | } |
| 140 | return 0; |
| 141 | } |