Hello, I'm trying to unbrick a Netgear ReadyNAS 104 (Armada 370). (I accidentally erased the u-boot partition in NAND when I tried to change the NAND partitioning to make the Debian bullseye kernel+initramfs fit.)
I have the Vendor U-Boot image that I can boot using kwboot. Its first
byte is 0x8b which is the right for NAND booting. The image's size is
0xda548 bytes.
I wrote the image to the start of NAND and verified it to be correctly
written:
Marvell>> nand read 0x2100000 0 0xda548
NAND read: device 0 offset 0x0, size 0xda548
894280 bytes read: OK
Marvell>> dhcp
egiga1 wait for link .Done - link up.
...
DHCP client bound to address 192.168.77.145
Marvell>> tftp 0x2000000 192.168.77.175:u-boot-rn104-2.0.img
Using egiga1 device
TFTP from server 192.168.77.175; our IP address is 192.168.77.145
Filename 'u-boot-rn104-2.0.img'.
Load address: 0x2000000
Loading: #############################################################
done
Bytes transferred = 894280 (da548 hex)
Marvell>> cmp.b 0x2000000 0x2100000 0xda548
Total of 894280 bytes were the same
There are no bad blocks in this area.
Also the checksum is right as far as I understand:
$ python3
...
>>> a = open("/srv/tftp/u-boot-rn104-2.0.img", "rb")
>>> data = a.read(0x14000)
>>> len(data)
81920
>>> hex(sum(data[:31]) + sum(data[32:]))
'0x79f616'
So the checksum field should be 0x16 (at offset 31), which it is:
Marvell>> md.b 0x2100000
02100000: 8b 00 00 00 48 65 0c 00 01 01 00 40 00 40 01 00
....He.....@.@..
02100010: 00 00 00 00 00 00 00 00 00 02 01 00 00 00 01 16
................
02100020: 02 01 18 35 02 00 00 00 5b 00 00 00 00 00 00 00
...5....[.......
02100030: ff 5f 2d e9 1c 00 00 fa 00 00 a0 e3 ff 9f bd e8
._-.............
Still when trying to boot I get:
BootROM 1.08
Booting from NAND flash
BootROM: Invalid header checksum
BootROM: Bad header at offset 00010000
BootROM: Bad header at offset 00020000
BootROM: Bad header at offset 00030000
BootROM: Bad header at offset 00040000
BootROM: Bad header at offset 00050000
BootROM: Bad header at offset 00060000
BootROM: Bad header at offset 00070000
BootROM: Bad header at offset 00080000
BootROM: Bad header at offset 00090000
BootROM: Bad header at offset 000A0000
BootROM: Bad header at offset 000B0000
BootROM: Bad header at offset 000C0000
BootROM: Bad header at offset 000D0000
BootROM: Bad header at offset 000E0000
BootROM: Bad header at offset 000F0000
BootROM: Bad header at offset 00100000
BootROM: Bad header at offset 00110000
BootROM: Bad header at offset 00120000
BootROM: Bad header at offset 00130000
BootROM: Bad header at offset 00140000
BootROM: Bad header at offset 00150000
BootROM: Bad header at offset 00160000
BootROM: Bad header at offset 00170000
BootROM: Bad header at offset 00180000
BootROM: Bad header at offset 00190000
BootROM: Bad header at offset 001A0000
BootROM: Bad header at offset 001B0000
BootROM: Bad header at offset 001C0000
BootROM: Bad header at offset 001D0000
BootROM: Bad header at offset 001E0000
BootROM: Bad header at offset 001F0000
BootROM: Bad header at offset 00200000
BootROM: Bad header at offset 00210000
BootROM: Bad header at offset 00220000
...
Is there anything obvious I'm missing or doing wrong? Does "Invalid
header checksum" indicate that the 0x16 is wrong or is there another
checksum anywhere that I missed? Any other idea?
If you have an idea and prefer irc over email, I hang around e.g. in
#mvlinux on libera as ukleinek.
Best regards
Uwe
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