Ancestors

Written by js on 2024-08-13 at 18:51

Finally managed to dump the UEFI from the #LoongArch #XC-LS3A6M board. Found two flash chips that didn’t contain UEFI and was confused. Guess where the actual UEFI flash chip was? Yep. Below the CPU cooler!

Also, I now know that the UEFI consists of parts compiled by a Meng Xiangdong for the LoongArch UEFI parts, while the parts specific to the XC-LS3A6M are compiled by a Luka Lian.

I know that because they leaked source paths into the binary, of course.

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Written by js on 2024-08-13 at 18:55

@ariadne Also, I now got definitive proof that the board is made by ASUS. I believe the leaked source paths starting with “/home/luka_lian/xc-fusion/Build/Ls3a60007a/RELEASE_GCC5/LOONGARCH64/AsusPkg” are very clear.

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Written by js on 2024-08-13 at 18:58

@ariadne Also, they used a debug build. Have you dumped the reference board yet? If that one is not debug, the XC-LS3A6M might be very interesting for porting coreboot ;).

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Toot

Written by js on 2024-08-13 at 19:09

@ariadne 923800a0fcb2cbb90315afaf3f99aba8d139d3018a4594866f148254fcffc7b6

Do you have the the same?

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Descendants

Written by Ariadne Conill 🐰:therian: on 2024-08-13 at 19:13

@js i am busy, i will look later

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Written by Ariadne Conill 🐰:therian: on 2024-08-13 at 19:46

@js yes, that matches the dump i have for the XC-LS3A6M. did not know that firmware was built with debug though. the EVB firmware has some packages with debug, and others without.

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Written by js on 2024-08-13 at 20:24

@ariadne Not sure all is built with debug, but some parts definitely are!

Great to see you have the same SHA-256! I guess you didn’t change any settings on yours either than, still with the default Chinese and everything? If you did change it to English, I wonder if there is yet another flash where it stores settings ;).

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Written by Ariadne Conill 🐰:therian: on 2024-08-13 at 20:25

@js have not changed that board to english yet

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Written by js on 2024-08-13 at 20:25

@ariadne Cool, that explains! Nice :)

In that case there’s also zero identifying things in the UEFI! I guess we should just archive it somewhere?

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Written by Ariadne Conill 🐰:therian: on 2024-08-13 at 20:26

@js may be useful, but i would recommend sticking with the EVB for firmware shenanigans because of the dual flash

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Written by js on 2024-08-13 at 20:27

@ariadne Not sure how you dumped the flash, but did you see the pads next to the flash? I believe the dual flash can be added to that board by soldering on another flash chip.

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Written by Ariadne Conill 🐰:therian: on 2024-08-13 at 20:28

@js i used a clip-on programmer and yes, this does basically look to be a "gamerified" variation of the evaluation board

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Written by js on 2024-08-13 at 20:29

@ariadne Ah. There’s pin headers next to the flash. And pads for pin headers for the second flash as well. So you could just plug a cable and put the heat sink back to still have access to the flash :).

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