How to build working images for RPI

[Mike Karels]

(Sorry, I'm using a UTF-8-challenged mailer at the moment...)

Jose wrote:
> Hi,
> images built with crochet are not working (no boot,
> no nothing) on RPI but images downloaded from
> https://download.freebsd.org/ftp/snapshots/arm/armv6/ISO-IMAGES do

> How do they build the downloadable images?

> The wiki
> https://wiki.freebsd.org/arm/Raspberry%20Pi
> states that you can build your own images with crochet
> but it does not state how THEY build the working images
> that are on the FTP site.

> I notice that the images built with crochet are VERY different
> from the ones you download, for example:

> md0 has the crochet image, md1 the downloaded one

> crochet # gpart show md0
> =>      1  5859374  md0  MBR  (2.8G)
>          1       62       - free -  (31K)
>         63    34776    1  fat32lba  [active]  (17M)
>      34839     1001       - free -  (501K)
>      35840  5823488    2  freebsd  (2.8G)
>    5859328       47       - free -  (24K)

> crochet # gpart show md1
> =>     63  6291393  md1  MBR  (3.0G)
>         63     1008       - free -  (504K)
>       1071   102312    1  fat32lba  [active]  (50M)
>     103383  6188049    2  freebsd  (3.0G)
>    6291432       24       - free -  (12K)

> rochet # ll /mnt/md0/boot/msdos/
> total 2448
> -rwxr-xr-x  1 root  wheel      765 Nov 23 15:53 README*
> -rwxr-xr-x  1 root  wheel      199 Nov 23 15:53 boot.scr*
> -rwxr-xr-x  1 root  wheel       75 Nov 23 15:53 config.txt*
> -rwxr-xr-x  1 root  wheel       37 Nov 23 15:53 metadata*
> -rwxr-xr-x  1 root  wheel    19602 Nov 23 15:53 rpi.dtb*
> -rwxr-xr-x  1 root  wheel    21186 Nov 23 15:53 rpi.dts*
> -rwxr-xr-x  1 root  wheel   465860 Nov 23 15:53 u-boot.bin*
> -rwxr-xr-x  1 root  wheel        0 Nov 23 15:53 uEnv.txt*
> -rwxr-xr-x  1 root  wheel  1586895 Nov 23 15:53 ubldr*
> -rwxr-xr-x  1 root  wheel   386184 Nov 23 15:53 ubldr.bin*

> crochet # ll /mnt/md1/boot/msdos/
> total 13460
> drwxr-xr-x  1 root  wheel     4096 Nov 21 04:55 EFI/
> -rwxr-xr-x  1 root  wheel    23315 Nov 12  2018 bcm2708-rpi-0-w.dtb*
> -rwxr-xr-x  1 root  wheel    23071 Nov 12  2018 bcm2708-rpi-b-plus.dtb*
> -rwxr-xr-x  1 root  wheel    22812 Nov 12  2018 bcm2708-rpi-b.dtb*
> -rwxr-xr-x  1 root  wheel    22589 Nov 12  2018 bcm2708-rpi-cm.dtb*
> -rwxr-xr-x  1 root  wheel    52116 Nov 12  2018 bootcode.bin*
> -rwxr-xr-x  1 root  wheel       89 Nov 21 03:11 config.txt*
> drwxr-xr-x  1 root  wheel     4096 Nov 21 04:55 dtb/
> -rwxr-xr-x  1 root  wheel     6666 Nov 12  2018 fixup.dat*
> -rwxr-xr-x  1 root  wheel     2621 Nov 12  2018 fixup_cd.dat*
> -rwxr-xr-x  1 root  wheel     9895 Nov 12  2018 fixup_db.dat*
> -rwxr-xr-x  1 root  wheel     9895 Nov 12  2018 fixup_x.dat*
> drwxr-xr-x  1 root  wheel     4096 Nov 21 04:55 overlays/
> -rwxr-xr-x  1 root  wheel  2857060 Nov 12  2018 start.elf*
> -rwxr-xr-x  1 root  wheel   678532 Nov 12  2018 start_cd.elf*
> -rwxr-xr-x  1 root  wheel  5120484 Nov 12  2018 start_db.elf*
> -rwxr-xr-x  1 root  wheel  4057956 Nov 12  2018 start_x.elf*
> -rwxr-xr-x  1 root  wheel   465868 Nov 21 03:06 u-boot.bin*
> -r-xr-xr-x  1 root  wheel   386408 Nov 21 04:48 ubldr.bin*

> crochet # cat /mnt/md0/boot/msdos/config.txt
> gpu_mem=32
> device_tree=rpi.dtb
> device_tree_address=0x100
> kernel=u-boot.bin

> crochet # cat /mnt/md1/boot/msdos/config.txt
> init_uart_clock=3000000
> enable_uart=1
> kernel=u-boot.bin
> kernel7=u-boot.bin
> dtoverlay=mmc

> I had to patch crochet to have the image built, but that's another
> story.

> Can anyone point me on how to build working images
> for RPI?

I'm not an expert, having done this for the first time yesterday, but
the short answer is like this:

	cd ^/release/; ./release.sh -c arm64/RPI3.conf

Note that this will build a complete chroot for the build system, including
ports, with sources that it checks out, and then builds the target system.
The chroot is built in /scratch.  I built from head on amd64.

		Mike