kobs-ng "bootstream too large" on iMX28

[hongyuplim]

Hello All,

I modified NAND mtd partition ion  on iMX28.

===============================================

0x000000000000-0x000000100000 : "gpmi-nfc-u-boot"

0x000000100000-0x000000600000 : "gpmi-nfc-kernel"

0x000000600000-0x000006a00000 : "gpmi-nfc-general-use"

0x000007000000-0x000008000000 : "gpmi-nfc-user"

===============================================

And I downloaded imx28_ivt_uboot.sb into NAND boot ( mtd0 ) with mfgtool.

"imx28_ivt_uboot.sb" size = 175KB

================================================

flash_eraseall /dev/mtd0

kobs-ng init -v imx28_ivt_uboot.sb

================================================

But kobs-ng is failed " mtd: bootstream too large  mtd_init failed!" like below log.

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

                                                :

LOAD m_address=0x4102e7d4 m_count=0x000004b4

FILL m_address=0x4102ec88 m_count=0x00005db0 m_data=0x00000000

LOAD m_address=0x00008000 m_count=0x00000020

CALL m_address=0x00008000 m_data=0x00000000

* read SHA1 = dbaa4c1a4cadcef73fd43c0aeb08593c51846e43

* calc SHA1 = dbaa4c1a4cadcef73fd43c0aeb08593c51846e43

/tmp/file.utp: is a valid bootstream for key '00000000000000000000000000000000'

mtd: opening: "/dev/mtd0"

NFC Geometry

  ECC Algorithm          : BCH

  ECC Strength           : 8

  Page Size in Bytes     : 2112

  Metadata Size in Bytes : 10

  ECC Chunk Size in Bytes: 512

  ECC Chunk Count        : 4

  Payload Size in Bytes  : 2048

  Auxiliary Size in Bytes: 16

  Auxiliary Status Offset: 12

  Block Mark Byte Offset : 1999

  Block Mark Bit Offset  : 0

mtd: opened '/dev/mtd0' - '(null)'

mtd: max_boot_stream_size_in_bytes = 0

mtd: boot_stream_size_in_bytes = 178272

mtd: bootstream too large

mtd_init failed!

UTP: sending Non-success

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

But original partition is

================================================

0x000000000000-0x000001400000 : "gpmi-nfc-0-boot"

0x000001400000-0x000007000000 : "gpmi-nfc-general-use"

0x000007000000-0x000008000000 : "gpmi-nfc-user"

================================================

in case, kobs-ng is OK.

Please give me some advices...

Thanks,

Original Attachment has been moved to: kobs-ng_error.txt.zip

Original Attachment has been moved to: kobs-ng_ok.txt.zip

[alejandrolozan1 · Accepted solution]

Hi,

The boot area shall contain both search areas and two copies of the boot stream.

The minimum size should be the following fomula

:Boot_partition_minimum_size_in_bytes =  search_area_size_in_bytes * 2 + boot_stream_size * 2

search_area_size_in_bytes =  (1 << md->cfg.search_exponent) * stride_size_in_bytes;

where:        stride_size_in_bytes = PAGES_PER_STRIDE * mtd_writesize(md);     

  md->cfg.search_exponent = 2;

boot_stream_size = file_size_of(bootstream);

You have to consider that formula.

Best Regards,

Alejandro