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Re: cannot boot from microSD card on aarch64 machine
From: |
Vagrant Cascadian |
Subject: |
Re: cannot boot from microSD card on aarch64 machine |
Date: |
Wed, 02 Mar 2022 10:19:20 -0800 |
On 2022-03-02, Ricardo Wurmus wrote:
> I got myself a rockpro64 board.
...
> So I then decided to build my own system and install a new u-boot onto
> the microSD card. Here’s the system I built:
...
> (bootloader (bootloader-configuration
> (bootloader u-boot-rockpro64-rk3399-bootloader)
> ;; SD card/eMMC (SD priority) storage
> (target "/dev/mmcblk1")))
You need to leave a pretty generous gap at the partition table of your
microSD, either a GPT partition table with various partitions for the
various u-boot bits:
http://opensource.rock-chips.com/wiki_Partitions
or an MBR partition table with the first partition starting at sector
32768, and the previous sectors empty.
Otherwise, the u-boot installation may clobber parts of your partition
table or vice-versa.
Also, if you have a different u-boot installed to SPI or eMMC, those
will take priority over microSD on most rockchip platforms.
> (kernel linux-libre)
> (kernel-arguments
> (list "console=ttyS2")) ; UART2 connected on the Pi2 bus
I assume you're using a serial console. The rockchip platforms usually
default 1500000 for baud ... usually I use:
screen /dev/ttyUSB0 1500000
Oh, now that I think about it, you might also want to set the speed for
your console in kernel-arguments:
(kernel-arguments
(list "console=ttyS2,1500000"))
> Does it perhaps install the u-boot files at the wrong offsets? How
> would I begin to debug this?
It is also entirely possible something is wrong with rockpro64 u-boot
offsets or u-boot itself ... been a while since I've tested.
live well,
vagrant
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