Hi Stefan,
My first suspicion would be that u-boot and Fiasco.OC are using
different UART settings, e.g., the baudrate might be different. With
which baudrate do you connect to the serial line? I would expect
Fiasco.OC to use 115200.
You could also try to find the place in Fiasco.OC/bootstrap where the
UART gets configured, and comment out any hardware access there, to
verify/falsify my idea. The UART is already configured properly by
u-boot, so Fiasco.OC should be able to send characters successfully
over serial line.
Thanks, I will try this once I have slightly more time. Noteworthy, the
UART is indeed configured to 115200.
I have also tried to directly launch the image from the Pi to compare
the output on a regular HDMI-screen. However, in this case, I receive no
output at all after booting the image in uboot so I am not sure whether
the source of the error is really the UART.
Best regards,
Simon
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Today's Topics:
1. Re: Running Genode on a Raspberry Pi 3 (Stefan Kalkowski)
2. Re: partial free/split for ds (Christian Helmuth)
3. Re: partial free/split for ds (Alexander Tormasov)
----------------------------------------------------------------------
Message: 1
Date: Wed, 4 Nov 2020 13:10:40 +0100
From: Stefan Kalkowski <[email protected]>
To: Genode users mailing list <[email protected]>
Subject: Re: Running Genode on a Raspberry Pi 3
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Hello Simon,
On Wed, Nov 04, 2020 at 11:54:01AM +0100, Simon Himmelbauer wrote:
Hi Genodians,
I am trying to get a Genode image using the Fiasco.OC-kernel running on an
RPi 3. I created an arm_v8a build directory and accordingly set the KERNEL
and BOARD variable. I also compiled a u-boot image from the upstream
repository.
When I attempt to boot the image from the u-boot prompt, I receive the
output below with no further reaction. I am still on Genode 19.05 because of
a few modifications so I unless there is no other solution, I would like to
avoid upgrading to a newer version.
I also tried to run a few L4Re images provided here [0] with the same
result, so the problem might not even be specific to Genode.
Does anyone else have experiences with running on an RPi 3? Is there
anything I am missing here?
My first suspicion would be that u-boot and Fiasco.OC are using
different UART settings, e.g., the baudrate might be different. With
which baudrate do you connect to the serial line? I would expect
Fiasco.OC to use 115200.
You could also try to find the place in Fiasco.OC/bootstrap where the
UART gets configured, and comment out any hardware access there, to
verify/falsify my idea. The UART is already configured properly by
u-boot, so Fiasco.OC should be able to send characters successfully
over serial line.
Regards
Stefan
Best regards,
Simon
[0] https://l4re.org/download/snapshots/pre-built-images/arm64/
U-Boot 2021.01-rc1-00243-g7a8ac9df5d (Nov 04 2020 - 01:56:08 +0100)
DRAM: 948 MiB
RPI 3 Model B (0xa22082)
MMC: mmc@7e202000: 0, sdhci@7e300000: 1
Loading Environment from FAT... *** Warning - bad CRC, using default
environment
In: serial
Out: vidconsole
Err: vidconsole
Net: No ethernet found.
starting USB...
Bus usb@7e980000: USB DWC2
scanning bus usb@7e980000 for devices... 3 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot: 0
U-Boot> fatload mmc 0 $loadaddr image.elf
3208480 bytes read in 137 ms (22.3 MiB/s)
U-Boot> bootelf
## Starting application at 0x01000000 ^��Z��%��XE��TmyAEDMe�@�*`)5��R[qP���
�����?�RQ@���VRY��5� �R A!��y=AA!y5YE)�}AG@A�Ţ�A����ӉR
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