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sipeed / LicheePi4A

LicheePi4A info&sdk
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boot process #12

Closed KwangSon closed 1 year ago

KwangSon commented 1 year ago

Hi, I want to know early boot process after rom.

https://wiki.sipeed.com/hardware/en/lichee/th1520/lpi4a/7_develop.html#U-boot

I can find rom -> uboot spl. which adress of spl should placed?(how rom read spl? file name? or just chunk of address?)

i've tested with prebuilt uboot load same uboot image again.(for make sure it works.)

ext4load mmc 1:1 0x1c00000 u-boot-with-spl.bin
go 0x1c00000

it just hang after ## Starting application at 0x01C00000 ...

dtometzki commented 1 year ago

Hello KwangSon,

perhaps you will find here all the iformation what do you need: ? https://gitee.com/thead-yocto/u-boot/blob/master/include/configs/light-c910.h

At line 425 you find the info for licheepi4a

KwangSon commented 1 year ago

Hello KwangSon,

perhaps you will find here all the iformation what do you need: ? https://gitee.com/thead-yocto/u-boot/blob/master/include/configs/light-c910.h

At line 425 you find the info for licheepi4a

Hi, thanks for comment. More detail, I want to know how brom load uboot image(emmc) to ram, because I'm try to upstream uboot. :) This is only vendor can know.

orangecms commented 1 year ago

Hi, some people from Sipeed (IIUC) are working on upstreaming; first patches just occurred in the U-Boot mailing list: https://lists.denx.de/pipermail/u-boot/2023-May/518879.html

From what I understand, the TH1520 implements the Android fastboot thing in the mask ROM. I keep asking for a SoC manual. Hope we'll get one at some point.

Hope that helps a bit. :)

KwangSon commented 1 year ago

Hi, some people from Sipeed (IIUC) are working on upstreaming; first patches just occurred in the U-Boot mailing list: https://lists.denx.de/pipermail/u-boot/2023-May/518879.html

From what I understand, the TH1520 implements the Android fastboot thing in the mask ROM. I keep asking for a SoC manual. Hope we'll get one at some point.

Hope that helps a bit. :)

Great! thanks, it helped.