9. Запись содержимого разделов Запись таблицы GPT выполняется функцией sunxi_sprite_download_mbr
#define GPT_BUFF_SIZE (8*1024)
#define GPT_ENTRY_OFFSET 1024
#define GPT_HEAD_OFFSET 512
#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL // это строка 'EFI PART'
// суффикс ULL превращает строку в тип unsigned long long
int sunxi_sprite_download_mbr(void *buffer, uint buffer_size)
{
typedef int (*FLASH_WIRTE)(uint start_block, uint nblock, void *buffer);
FLASH_WIRTE flash_write_pt = NULL;
int ret = 0;
int storage_type = 0;
gpt_header *gpt_head = (gpt_header*)(buffer + GPT_HEAD_OFFSET);
storage_type = get_boot_storage_type();
if(sunxi_flash_init())
return -1;
if (buffer_size != GPT_BUFF_SIZE)
{ printf("the GPT size is bad");
return -1;
}
if(gpt_head->signature != GPT_HEADER_SIGNATURE)
{ printf("gpt magic error, %llx != %llx",gpt_head->signature,
GPT_HEADER_SIGNATURE);
return 0;
}
gpt_fix_flash_size(buffer, storage_type);
/*write to logic addr for uboot use*/
ret = sunxi_flash_write(0, (buffer_size+511)>>9, buffer);
if(!ret) {
debug("%s:write gpt sectors fail",__func__);
goto __err_end;
}
// write to phy addr for kernel use
if(STORAGE_EMMC == storage_type || STORAGE_EMMC3 == storage_type)
{ ret = sunxi_flash_phywrite(0, buffer_size>>9, buffer);
if(!ret)
goto __err_end;
}
printf("write primary GPT success");
prepare_backup_gpt_header(gpt_head);
if(STORAGE_EMMC == storage_type || STORAGE_EMMC3 == storage_type
|| STORAGE_NOR == storage_type)
flash_write_pt = sunxi_flash_phywrite;
else
flash_write_pt = sunxi_flash_write;
// write back-up gpt PTE
ret = flash_write_pt(gpt_head->last_usable_lba + 1,
(GPT_BUFF_SIZE-GPT_ENTRY_OFFSET)/512,
buffer+GPT_ENTRY_OFFSET);
if(!ret)
goto __err_end;
// write back-up gpt HEAD
ret = flash_write_pt(gpt_head->my_lba, 1,
buffer+GPT_HEAD_OFFSET);
if(!ret) {
goto __err_end;
}
printf("write Backup GPT success");
return 0;
__err_end:
return -1;
}
Запись содержимого разделов выполняется функцией sunxi_sprite_deal_part(dl_map) Это отражается в логе сообщением: begin to download part
//------------------------------------------
int sunxi_sprite_deal_part(sunxi_download_info *dl_map)
{ dl_one_part_info *part_info;
int ret = -1;
int ret1;
int i = 0;
uchar *down_buff = NULL;
if (!dl_map->download_count)
{ printf("sunxi sprite: no part need to write");
return 0;
}
down_buff = (uchar *)memalign(CONFIG_SYS_CACHELINE_SIZE,
ALIGN(SPRITE_CARD_ONCE_DATA_DEAL + SPRITE_CARD_HEAD_BUFF,
CONFIG_SYS_CACHELINE_SIZE));
if (!down_buff)
{ printf("sunxi sprite err: unable to malloc memory for sunxi_sprite_deal_part");
goto __sunxi_sprite_deal_part_err1;
}
//---------- В цикле по всем разделам ---------------------
for (part_info = dl_map->one_part_info, i = 0;
i < dl_map->download_count; i++, part_info++)
{ // ------- один раздел --------------
tick_printf("begin to download part %s", part_info->name);
if (!strncmp("UDISK", (char *)part_info->name, strlen("UDISK")))
{ ret1 = __download_udisk(part_info, down_buff);
if (ret1 < 0)
{ printf("sunxi sprite err: sunxi_sprite_deal_part,
download_udisk failed");
goto __sunxi_sprite_deal_part_err2;
}
else if (ret1 > 0)
printf("do NOT need download UDISK");
} // Если это раздел sysrecovery, запиcать полный образ раздела.
else if (!strncmp("sysrecovery",(char *)part_info->name,strlen("sysrecovery")))
{ ret1 = __download_sysrecover_part(part_info, down_buff);
if (ret1 != 0)
{ printf("sunxi sprite err: sunxi_sprite_deal_part,
download sysrecovery failed");
goto __sunxi_sprite_deal_part_err2;
}
} // Если это раздел private, проверьте, требуется ли запись
else if (!strncmp("private",(char *)part_info->name, strlen("private")))
{ if (1) // видимо, здесь раньше была проверка какого-то значения
//Нужно записать этот раздел
{ printf("NEED down private part");
ret1 = __download_normal_part(part_info,
down_buff);
if (ret1 != 0)
{ printf("line:%d sunxi sprite err:
sunxi_sprite_deal_part, download private failed", __LINE__);
goto __sunxi_sprite_deal_part_err2;
}
}
else
printf("IGNORE private part");
}
else // любой другой раздел
{ ret1 = __download_normal_part(part_info, down_buff);
if (ret1 != 0)
{ printf("line:%d sunxi sprite err: sunxi_sprite_deal_part,
download private failed", __LINE__);
goto __sunxi_sprite_deal_part_err2;
}
}
tick_printf("successed in download part %s",
part_info->name);
}
// ---------- цикл закончен --------------
ret = 0;
__sunxi_sprite_deal_part_err1:
sunxi_sprite_exit(1);
__sunxi_sprite_deal_part_err2:
if (down_buff)
free(down_buff);
return ret;
}
Запись содержимого десяти разделов можно условно разбить на три этапа:
Раздел Super имеет огромный размер и хранится в образе прошивки в сжатом (sparse) формате. Потому его запись имеет особенности, которые отражены в сообщениях лога: chunk 0, chunk 1 ... и т.д. .... chunk 3840 chunk 3841 Весь распакованный файл разбивается на 3842 куска (chunk), и запись идет последовательно по одному куску. Для проверки sparce-формата используется функция unsparse_probe:
#define SPARSE_HEADER_MAGIC 0xed26ff3a
#define ANDROID_FORMAT_UNKNOW (0)
#define ANDROID_FORMAT_BAD (-1)
#define ANDROID_FORMAT_DETECT (1)
int unsparse_probe(char *source, uint length, uint android_format_flash_start)
{ sparse_header_t *header = (sparse_header_t *)source;
if (header->magic != SPARSE_HEADER_MAGIC)
{ printf("sparse: bad magic");
return ANDROID_FORMAT_BAD; // = -1
}
if ((header->major_version != SPARSE_HEADER_MAJOR_VER) ||
(header->file_hdr_sz != sizeof(sparse_header_t)) ||
(header->chunk_hdr_sz != sizeof(chunk_header_t)))
{ printf("sparse: incompatible format");
return ANDROID_FORMAT_BAD; // = -1
}
android_format_checksum = 0;
last_rest_size = 0;
chunk_count = 0;
chunk_length = 0;
sparse_format_type = SPARSE_FORMAT_TYPE_TOTAL_HEAD;
flash_start = android_format_flash_start;
total_chunks = header->total_chunks;
return ANDROID_FORMAT_DETECT; // =1
}
Об отсутствии sparse-формата у содержимого всех разделов, кроме super, свидетельствует сообщение лога: sparse: bad magic Лог: Запись содержимого разделов write primary GPT success write Backup GPT success [08.232]update partition map [08.239]begin to download part [08.242]begin to download part bootloader_a partdata hi 0x0 partdata lo 0x724c00 sparse: bad magic [08.622]successed in writting part bootloader_a origin_verify value = c88ada1c, active_verify value = c88ada1c [08.684]successed in verify part bootloader_a [08.688]successed in download part bootloader_a [08.692]begin to download part env_a partdata hi 0x0 partdata lo 0x20000 sparse: bad magic [08.709]successed in writting part env_a origin_verify value = 9ece546b, active_verify value = 9ece546b [08.720]successed in verify part env_a [08.723]successed in download part env_a [08.727]begin to download part boot_a partdata hi 0x0 partdata lo 0x4000000 sparse: bad magic [12.059]successed in writting part boot_a origin_verify value = 5730d9b, active_verify value = 5730d9b [12.528]successed in verify part boot_a [12.532]successed in download part boot_a [12.536]begin to download part vendor_boot_a partdata hi 0x0 partdata lo 0x2000000 sparse: bad magic [14.200]successed in writting part vendor_boot_a origin_verify value = f4e2c683, active_verify value = f4e2c683 [14.446]successed in verify part vendor_boot_a [14.450]successed in download part vendor_boot_a // ----------- Запись Super -------------------- [14.454]begin to download part super partdata hi 0x0 partdata lo 0x5f17023c chunk 0(3842) chunk 1(3842) chunk 2(3842) chunk 3(3842) chunk 4(3842) chunk 5(3842) chunk 6(3842) chunk 7(3842) chunk 8(3842) chunk 9(3842) chunk 10(3842) chunk 11(3842) chunk 12(3842) chunk 13(3842) chunk 14(3842) chunk 15(3842) chunk 16(3842) chunk 17(3842) chunk 18(3842) chunk 19(3842) chunk 20(3842) ...................... ...................... chunk 3825(3842) chunk 3826(3842) chunk 3827(3842) chunk 3828(3842) chunk 3829(3842) chunk 3830(3842) chunk 3831(3842) chunk 3832(3842) chunk 3833(3842) chunk 3834(3842) chunk 3835(3842) chunk 3836(3842) chunk 3837(3842) chunk 3838(3842) chunk 3839(3842) chunk 3840(3842) chunk 3841(3842) [372.946]successed in writting part super origin_verify value = 1ed2310, active_verify value = 1ed2310 [372.959]successed in verify part super [372.962]successed in download part super //------------------- [372.966]begin to download part misc partdata hi 0x0 partdata lo 0x1000000 sparse: bad magic [374.106]successed in writting part misc origin_verify value = b961f417, active_verify value = b961f417 [374.229]successed in verify part misc [374.233]successed in download part misc [374.236]begin to download part vbmeta_a partdata hi 0x0 partdata lo 0x2000 sparse: bad magic [374.249]successed in writting part vbmeta_a origin_verify value = dbf7471e, active_verify value = dbf7471e [374.259]successed in verify part vbmeta_a [374.263]successed in download part vbmeta_a [374.267]begin to download part vbmeta_system_a partdata hi 0x0 partdata lo 0x1000 sparse: bad magic [374.278]successed in writting part vbmeta_system_a origin_verify value = fc0dd60d, active_verify value = fc0dd60d [374.289]successed in verify part vbmeta_system_a [374.293]successed in download part vbmeta_system_a [374.298]begin to download part vbmeta_vendor_a partdata hi 0x0 partdata lo 0x1000 sparse: bad magic [374.308]successed in writting part vbmeta_vendor_a origin_verify value = 6eac8c8f, active_verify value = 6eac8c8f [374.319]successed in verify part vbmeta_vendor_a [374.324]successed in download part vbmeta_vendor_a [374.328]begin to download part dtbo_a partdata hi 0x0 partdata lo 0x200000 sparse: bad magic [374.441]successed in writting part dtbo_a origin_verify value = 6f6ab67a, active_verify value = 6f6ab67a [374.466]successed in verify part dtbo_a [374.470]successed in download part dtbo_a [374.474]successed in downloading part |
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