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Old 02-07-2019, 12:57   #1 (permalink)
orx
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Samsung TAB P7500 no GPT


HI guys

i need help with a P7500 hard bricked

I tried to write dump with easy jtag but error for missing Gpt i tried to write pit always in easy jtag but nothing .. i don't know which is the correct procedure for repartition

thanks
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Old 02-09-2019, 12:36   #2 (permalink)
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P7500 it's a NVidia device
Nvidia devices are have athother partition table - PT
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Old 02-09-2019, 18:57   #3 (permalink)
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hi and thanks
so exist a method for this model fot rebuild partition ?
this is what I managed to get ..

but no power on


p7500.JPG
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Old 02-09-2019, 19:37   #4 (permalink)
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Quote:
Originally Posted by orx View Post
hi and thanks
so exist a method for this model fot rebuild partition ?
this is what I managed to get ..

but no power on

As Samsung partiton table readed from PIT file
And you see "PT" partition - It's a Nvidia Partition table

We can't fully add support Nvidia on Samsung.
It's a hard work.

Nvidia have a blob keys, without it device not work


p.s.
you can restore Nvidia devices only if you have backup ROM2/3 and begin of ROM1 (200-500MB)

at you screen you have blank ROM2/3 - you can't restore it

Last edited by layder; 02-09-2019 at 20:08.
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Old 02-10-2019, 09:23   #5 (permalink)
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Quote:
Originally Posted by layder View Post
p.s. you can restore Nvidia devices only if you have backup ROM2/3 and begin of ROM1 (200-500MB)

at you screen you have blank ROM2/3 - you can't restore it



hi friend

sorry a last thing ..

if i've full dump is possible extract rom1 , rom 2 and rom 3 ?

thanks

Last edited by layder; 02-10-2019 at 10:33. Reason: correct quoting format
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Old 02-10-2019, 10:42   #6 (permalink)
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Nvidia Tegra devices have individual device "blob" keys.

Nvidia Tegra devices have "linear" adressing.

zero address is the beginning of rom2
Further continuation is written in rom3,
and further rom1

therefore, for nvidia, the data recorded in section 0 of rom1 have an address that is the sum of the length of rom2 and rom3

for example rom2 and rom3 have a size of 4mb (0x400000)
data at the beginning of rom1 for the processor will have an address (0x800000)

Nvidea keys is stored at BCT partition
BCT partittion are placed uasially at rom3 or begin of rom1, depended of size of partitions

it's a example:

eMMC Init returned = 0
EMMC Device Information :
EMMC CID: 1501004D414734464112090E8A593F77
EMMC CSD: D02701320F5903FFF6DBFFEF8A404067
EMMC Manufacture : SAMSUNG , EMMC NAME: MAG4FA , HEX: 4D4147344641 , S/N: 090E8A59 , rev. 0x12
EMMC Manufacture ID: 0x15 , OEM ID: 0x00 , Device Type: BGA (Discrete embedded) , Date: 3/2012
EMMC ROM 1 (Main User Data) Capacity: 15028 MB (0003AB400000)
EMMC ROM 2/3 (Boot Partition 1/2) Capacity: 512 KB (000000080000)
EMMC RPMB (Replay Protected Memory Block) Capacity: 128 KB (000000020000)
EMMC Permanent Write Protection: No
EMMC Temporary Write Protection: No
EMMC BootArea Write Protection: No
Extended CSD Information :
Extended CSD rev: 1.5 (MMC 4.41)
Boot configuration [PARTITION_CONFIG]: 0x00 , Boot from: no boot
Boot Bus Config: 0x00 , width 1bit
H/W Reset Function [RST_N_FUNCTION]: 0x00, RST_n signal is temporarily disabled
Supported partition features [PARTITIONING_SUPPORT]: 0x03
Device supports partitioning features
Device can have enhanced technological features in partitions and user data area
Partition Settings [PARTITION_SETTING_COMPLETED]: 0x00
Backup saved: MAG4FA_090E8A59_20181114_144106.extcsd

Scanning soft partitions
NVidia header is found
Partition: mmcblk0p0 (BCT) Address in , [000000000000 - 000000400000], size: 000000400000 (4,00 MB)
Partition: mmcblk0p1 (PT) Address in ROM1, [000000300000 - 000000500000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p2 (EBT) Address in ROM1, [000000500000 - 000000B00000], size: 000000600000 (6,00 MB)
Partition: mmcblk0p3 (GP1) Address in ROM1, [000000B00000 - 000000D00000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p4 (SOS) Address in ROM1, [000000D00000 - 000001300000], size: 000000600000 (6,00 MB)
Partition: mmcblk0p5 (LNX) Address in ROM1, [000001300000 - 000001B00000], size: 000000800000 (8,00 MB)
Partition: mmcblk0p6 (APP) Address in ROM1, [000001B00000 - 000031B00000], size: 000030000000 (768 MB)
Partition: mmcblk0p7 (CAC) Address in ROM1, [000031B00000 - 000069F00000], size: 000038400000 (900 MB)
Partition: mmcblk0p8 (MSC) Address in ROM1, [000069F00000 - 00006A100000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p9 (PIA) Address in ROM1, [00006A100000 - 00008A100000], size: 000020000000 (512 MB)
Partition: mmcblk0p10 (SEC) Address in ROM1, [00008A100000 - 00008B500000], size: 000001400000 (20,0 MB)
Partition: mmcblk0p11 (USP) Address in ROM1, [00008B500000 - 000094100000], size: 000008C00000 (140 MB)
Partition: mmcblk0p12 (PDA) Address in ROM1, [000094100000 - 000095500000], size: 000001400000 (20,0 MB)
Partition: mmcblk0p13 (UDA) Address in ROM1, [000095500000 - 0003AB100000], size: 000315C00000 (12,3 GB)
Partition: mmcblk0p14 (GPT) Address in ROM1, [0003AB100000 - 0003AB300000], size: 000000200000 (2,00 MB)
NVidia header successfully parsed

at this exmple BCT partition is stored at rom2/3 and ROM1
ROM2: 0.5MB
ROM3: 0.5MB
ROM1: 3MB

(PT) partittion stores at 0x000000300000 Address in ROM1, after end of BCT


and example 2

Setting bus width to 8 Bit
Setting frequence to 21 Mhz
eMMC Init returned = 0
EMMC Device Information :
EMMC CID: 11010030333247373400088941B712F7
EMMC CSD: D02700320F5903FFFFFFFFE78640009B
EMMC Manufacture : TOSHIBA , EMMC NAME: 032G74 , HEX: 303332473734 , S/N: 088941B7 , rev. 0x00
EMMC Manufacture ID: 0x11 , OEM ID: 0x00 , Device Type: BGA (Discrete embedded) , Date: 1/2015
EMMC ROM 1 (Main User Data) Capacity: 29820 MB (000747C00000)
EMMC ROM 2/3 (Boot Partition 1/2) Capacity: 4096 KB (000000400000)
EMMC RPMB (Replay Protected Memory Block) Capacity: 4096 KB (000000400000)
EMMC Permanent Write Protection: No
EMMC Temporary Write Protection: No
Extended CSD Information :
Extended CSD rev: 1.7 (MMC 5.0, MMC 5.01)
Boot configuration [PARTITION_CONFIG]: 0x40 , Boot from: no boot
Boot Bus Config: 0x00 , width 1bit
H/W Reset Function [RST_N_FUNCTION]: 0x01, RST_n signal is permanently enabled
Supported partition features [PARTITIONING_SUPPORT]: 0x07
Device supports partitioning features
Device can have enhanced technological features in partitions and user data area
Device can have extended partitions attribute
Partition Settings [PARTITION_SETTING_COMPLETED]: 0x00
Backup saved: 032G74_088941B7_20180215_120713.extcsd
EMMC Init completed.

Scanning soft partitions
NVidia header is found
Partition: mmcblk0p0 (BCT) Address in BOOT1+BOOT2, [000000000000 - 000000800000], size: 000000800000 (8,00 MB)
Partition: mmcblk0p1 (PT) Address in ROM1, [FFFFFFFFFFC00000 - FFFFFFFFFFE00000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p2 (EBT) Address in ROM1, [FFFFFFFFFFE00000 - 000000400000], size: 000000600000 (6,00 MB)
Partition: mmcblk0p3 (LGE) Address in ROM1, [000000400000 - 000000600000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p4 (EKS) Address in ROM1, [000000600000 - 000000800000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p5 (GP1) Address in ROM1, [000000800000 - 000000A00000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p6 (SOS) Address in ROM1, [000000A00000 - 000001400000], size: 000000A00000 (10,0 MB)
Partition: mmcblk0p7 (LNX) Address in ROM1, [000001400000 - 000001E00000], size: 000000A00000 (10,0 MB)
Partition: mmcblk0p8 (APP) Address in ROM1, [000001E00000 - 000061E00000], size: 000060000000 (1,50 GB)
Partition: mmcblk0p9 (CAC) Address in ROM1, [000061E00000 - 000079E00000], size: 000018000000 (384 MB)
Partition: mmcblk0p10 (MSC) Address in ROM1, [000079E00000 - 00007A000000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p11 (USP) Address in ROM1, [00007A000000 - 00007F000000], size: 000005000000 (80,0 MB)
Partition: mmcblk0p12 (NVA) Address in ROM1, [00007F000000 - 00007F200000], size: 000000200000 (2,00 MB)
Partition: mmcblk0p13 (UDA) Address in ROM1, [00007F200000 - 00073AA00000], size: 0006BB800000 (26,9 GB)
Partition: mmcblk0p14 (DRM) Address in ROM1, [00073AA00000 - 00073BA00000], size: 000001000000 (16,0 MB)
Partition: mmcblk0p15 (MLT) Address in ROM1, [00073BA00000 - 00073CA00000], size: 000001000000 (16,0 MB)
Partition: mmcblk0p16 (FOT) Address in ROM1, [00073CA00000 - 00073DE00000], size: 000001400000 (20,0 MB)
Partition: mmcblk0p17 (CAL) Address in ROM1, [00073DE00000 - 00073EE00000], size: 000001000000 (16,0 MB)
Partition: mmcblk0p18 (UDB) Address in ROM1, [00073EE00000 - 000747A00000], size: 000008C00000 (140 MB)
Partition: mmcblk0p19 (GPT) Address in ROM1, [000747A00000 - 000747C00000], size: 000000200000 (2,00 MB)
NVidia header successfully parsed


BCT fully placed at ROM2/3

Last edited by layder; 02-10-2019 at 10:56.
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Old 02-10-2019, 10:58   #7 (permalink)
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if you have backup you need
1) configure sizes of ROM2/3 as at backup
2) write:
ROM2 to ROM2
ROM3 to ROM3
ROM1 to ROM1
3) try to "check eMMC" with option: "Read partition info"
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