Date: Fri, 8 Jul 2022 18:34:54 -0300 From: "Dr. Rolf Jansen" <freebsd-rj@cyclaero.com> To: freebsd-arm <freebsd-arm@freebsd.org> Cc: John Kennedy <warlock@phouka.net>, Mark Millard <marklmi@yahoo.com> Subject: Re: Failed to execute custom kernels which where build on a RPi 4 operated by 13.1-RELEASE Message-ID: <E1353A37-4AC5-48FB-9209-358C245963C0@cyclaero.com> In-Reply-To: <DD01DB57-7E6D-496F-9D31-762964F52388@yahoo.com> References: <B1296677-558F-49F3-B7B7-2784ACA6612B@cyclaero.com> <YsOU/Gzxnrq6H2sJ@phouka1.phouka.net> <D523159F-CEF5-4F98-92E8-11C79F5C6419@cyclaero.com> <YsRB9uOlUNOoDBVu@phouka1.phouka.net> <71D4E84B-5D80-43A5-BE22-8E4F6486B7E4@cyclaero.com> <DD01DB57-7E6D-496F-9D31-762964F52388@yahoo.com>
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> Am 06.07.2022 um 02:01 schrieb Mark Millard <marklmi@yahoo.com>:
>=20
> On 2022-Jul-5, at 08:09, Dr. Rolf Jansen <freebsd-rj@cyclaero.com> =
wrote:
>=20
>>> . . .
>>=20
>> That would be the second step. The first step would be that somebody =
else confirms my finding that building and running a custom kernel on a =
stock FreeBSD 13.1-RELEASE on RPi 4 does not work out. And actually that =
was my initial question.
>>=20
>> (1) In case somebody raises her/his hand telling, that this worked =
flawlessly on their system,
>> then I would have a more in deep look, what might have gone wrong =
here.
>>=20
>> (2) In case the issue would be confirmed, then I would submit a bug =
report, and the discussion
>> may continue in a more productive way on bugs.freebsd.org.
>=20
> Summary of the later material:
>=20
> It would appear that if building any kernels are
> broken, it is specific to some custom kernel(s)
> in question, not to building kernels in general.
> 13.1-RELEASE's install is able to build, install,
> and boot its own generic kernel on a 8GiByte
> RPi4B Rev. 1.4.
So we are talking about case (1 - works flawlessly as expected), and as =
I promised, I will look more in deep on what might have gone wrong here. =
For those who want to reproduce building of kernels completely from the =
scratch on the RPi 4 in the shortest possible way, I leave a transcript =
of the procedure at the very bottom of this message (see: *** Installing =
FreeBSD on a microSD card and building a (custom) kernel ****).
Results with the thus builded kernels:
13.1-GENERIC does work
13.1-GENERIC-MMCCAM does boot from the microSD, but USB does not work
13.1-GNNERIC-RPi4 stalls when booting.
cat /usr/src/sys/arm64/conf/GENERIC-RPi4
include GENERIC
ident GENERIC-RPi4
nooptions SOC_NVIDIA_TEGRA210
In the serial console:
...
mmcsd0: Error indicated: 1 Timeout
mountroot: waiting for device /dev/ufs/rootfs...
bcm_dma0: DMA error 4 on CH5
Mounting from ufs:/dev/ufs/rootfs failed with error 19.
My conclusion is that we may not completely disable NVIDIA Tegra 210. =
And after all, my goal was not exactly to disable the Tegra, but to =
mitigate the egoistic behaviour of its internal RTC driver for the =
MAX77620 (all i2c-addr 68 is mine). I achieved that goal by replacing in =
the source file /usr/src/sys/arm64/nvidia/tegra210/max77620_rtc.c (of =
13.1-RELEASE) the I2C address from 0x68 to 0x7F. Nothing uses 0x7F and =
so the MAX77620 driver may claim it for itself without harm to other =
devices.
sed -e "s/#define MAX77620_RTC_I2C_ADDR.0x68/#define =
MAX77620_RTC_I2C_ADDR 0x7F/" \
-i "" /usr/src/sys/arm64/nvidia/tegra210/max77620_rtc.c=20
13.1-GENERIC (patched) does work, including the DS3231 RTC on i2c1 =
address 0x68.
...
iicbus0: <OFW I2C bus> on iichb0
iic0: <I2C generic I/O> on iicbus0
ds32310: <Maxim DS3231 RTC> at addr 0xd0 on iicbus0
...
...
mmcsd0: 16GB <SDHC SL16G 8.0 SN 399D0D61 MFG 09/2016 by 3 SD> at mmc1 =
50.0MHz/4bit/65535-block
bcm2835_cpufreq0: ARM 1500MHz, Core 500MHz, SDRAM 400MHz, Turbo ON
ds32310: registered as a time-of-day clock, resolution 1.000000s
...
Many thanks for all your inputs and efforts.
Best regards
Rolf
*** Installing FreeBSD on a microSD card and building a (custom) kernel =
****
1. Fetch the image and write it to a pristine microSD card:
# fetch =
https://download.freebsd.org/releases/arm64/aarch64/ISO-IMAGES/13.1/FreeBS=
D-13.1-RELEASE-arm64-aarch64-RPI.img.xz
# xz -d FreeBSD-13.1-RELEASE-arm64-aarch64-RPI.img.xz
# dd if=3DFreeBSD-13.1-RELEASE-arm64-aarch64-RPI.img of=3D/dev/da0 =
bs=3D1m conv=3Dsync
2. Preparation before the first start which automatically would max. out =
the UFS partition.
Hovever, I want to reserve space for a 2 GB swap partition
(omit this step, in case you don't want a swap p.):
# gpart resize -i 2 da0
# gpart show da0 da0s2
=3D> 63 31116225 da0 MBR (15G)
63 2016 - free - (1.0M)
2079 102312 1 fat32lba [active] (50M)
104391 31011897 2 freebsd (15G)
=3D> 0 31011897 da0s2 BSD (15G)
0 57 - free - (29K)
57 6186880 1 freebsd-ufs (2.9G)
6186937 24824960 - free - (12G)
Calculate the base (start) of the swap partition, e.g. here: 6186937 =
+ 24824960 - 4*1024*1024 =3D 26817593
# gpart add -b 26817593 -t freebsd-swap da0s2
# gpart show da0s2
=3D> 0 31011897 da0s2 BSD (15G)
0 57 - free - (29K)
57 6186880 1 freebsd-ufs (2.9G)
6186937 20630656 - free - (9.8G)
26817593 4194304 2 freebsd-swap (2.0G)
3. Start the RPi 4 with the SD card and enter via serial console as =
root:
login: root
Password:
May 12 08:46:57 generic login[1206]: ROOT LOGIN (root) ON ttyu0
FreeBSD 13.1-RELEASE releng/13.1-n250148-fc952ac2212 GENERIC
Welcome to FreeBSD!
Release Notes, Errata: https://www.FreeBSD.org/releases/
Security Advisories: https://www.FreeBSD.org/security/
FreeBSD Handbook: https://www.FreeBSD.org/handbook/
FreeBSD FAQ: https://www.FreeBSD.org/faq/
Questions List: =
https://lists.FreeBSD.org/mailman/listinfo/freebsd-questions/
FreeBSD Forums: https://forums.FreeBSD.org/
Documents installed with the system are in the =
/usr/local/share/doc/freebsd/
directory, or can be installed later with: pkg install =
en-freebsd-doc
For other languages, replace "en" with a language code like de or fr.
Show the version of FreeBSD installed: freebsd-version ; uname -a
Please include that output and any error messages when posting =
questions.
Introduction to manual pages: man man
FreeBSD directory layout: man hier
To change this login announcement, see motd(5).
root@generic:~ # gpart show
=3D> 63 31116225 mmcsd0 MBR (15G)
63 2016 - free - (1.0M)
2079 102312 1 fat32lba [active] (50M)
104391 31011897 2 freebsd (15G)
=3D> 0 31011897 mmcsd0s2 BSD (15G)
0 57 - free - (29K)
57 26814464 1 freebsd-ufs (13G)
26814521 3072 - free - (1.5M)
26817593 4194304 2 freebsd-swap (2.0G)
4. Donwload and install the sources:
# cd /
# fetch --no-verify-peer =
https://download.freebsd.org/releases/arm64/aarch64/13.1-RELEASE/src.txz
# tar -xzf src.txz
5. Build and install the GENERIC kernel
=20
# cd /usr/src
# make -j4 buildkernel KERNCONF=3DGENERIC
# make installkernel KERNCONF=3DGENERIC
6. Restart the RPi 4
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