❯ tio /dev/ttyACM0
[16:08:51.162] tio 3.9
[16:08:51.162] Press ctrl-t q to quit
[16:08:51.163] Connected to /dev/ttyACM0

U-Boot SPL 2021.01-gf036fbdc (Sep 02 2023 - 15:46:33 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.6.4--v08.06.04 (Chill Capybar')
SPL initial stack usage: 13424 bytes
Trying to boot from MMC1
Loading Environment from MMC... MMC: block number 0x3500 exceeds max(0x2000)
*** Warning - !read failed, using default environment

init_env from device 9 not supported!
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.9(release):v2.9.0
NOTICE:  BL31: Built : 15:46:33, Sep  2 2023
I/TC:
I/TC: OP-TEE version: 3.22.0 (gcc version 10.2.1 20210110 (Debian 10.2.1-6)) #1 Sat Sep  2 15:46:33 UTC 2023 aarch64
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check https://optee.readthedocs.io/en/latest/architecture/porting_guidelines.html
I/TC: Primary CPU initializing
I/TC: SYSFW ABI: 3.1 (firmware rev 0x0008 '8.6.4--v08.06.04 (Chill Capybar')
I/TC: HUK Initialized
I/TC: Primary CPU switching to normal world boot

U-Boot SPL 2021.01-gf036fbdc (Sep 02 2023 - 15:46:33 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0008 '8.6.4--v08.06.04 (Chill Capybar')
Trying to boot from MMC1


U-Boot 2021.01-gf036fbdc (Sep 02 2023 - 15:46:33 +0000)

SoC:   AM62X SR1.0 GP
Model: BeagleBoard.org BeaglePlay
Board: BEAGLEPLAY-A0- rev 02
DRAM:  2 GiB
MMC:   mmc@fa10000: 0, mmc@fa00000: 1, mmc@fa20000: 2
Loading Environment from MMC... MMC: block number 0x3500 exceeds max(0x2000)
*** Warning - !read failed, using default environment

In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
Error: Can't set serial# to SSSS
Net:   Could not get PHY for ethernet@8000000port@1: addr 0
am65_cpsw_nuss_port ethernet@8000000port@1: phy_connect() failed
No ethernet found.

Press SPACE to abort autoboot in 2 seconds
switch to partitions #0, OK
mmc1 is current device
Scanning mmc 1:1...
Found /extlinux/extlinux.conf
Retrieving file: /extlinux/extlinux.conf
1171 bytes read in 9 ms (127 KiB/s)
BeaglePlay microSD (extlinux.conf) (swap enabled)
1:      microSD (failsafe)
2:      microSD disable BCFSERIAL
3:      copy microSD to eMMC (default)
4:      microSD (debug)
5:      microSD
Enter choice: 3
3:      copy microSD to eMMC (default)
Retrieving file: /initrd.img
10870661 bytes read in 478 ms (21.7 MiB/s)
Retrieving file: /Image.gz
14474447 bytes read in 633 ms (21.8 MiB/s)
append: root=/dev/mmcblk1p3 ro rootfstype=ext4 rootwait net.ifnames=0 init=/usr/sbin/init-beagle-flasher
Retrieving file: /k3-am625-beagleplay.dtb
64468 bytes read in 11 ms (5.6 MiB/s)
kernel_comp_addr_r or kernel_comp_size is not provided!
1:      microSD (failsafe)
Retrieving file: /Image.gz
14474447 bytes read in 632 ms (21.8 MiB/s)
append: console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000 root=/dev/mmcblk1p3 ro rootfstype=ext4 rootwait net.ifnames=0
Retrieving file: /k3-am625-beagleplay.dtb
64468 bytes read in 11 ms (5.6 MiB/s)
kernel_comp_addr_r or kernel_comp_size is not provided!
2:      microSD disable BCFSERIAL
Retrieving file: /Image.gz
14474447 bytes read in 632 ms (21.8 MiB/s)
append: root=/dev/mmcblk1p3 ro rootfstype=ext4 rootwait net.ifnames=0
Retrieving file: /k3-am625-beagleplay.dtb
64468 bytes read in 11 ms (5.6 MiB/s)
Retrieving file: /overlays/k3-am625-beagleplay-bcfserial-no-firmware.dtbo
Failed to load '/overlays/k3-am625-beagleplay-bcfserial-no-firmware.dtbo'
Failed loading overlay /overlays/k3-am625-beagleplay-bcfserial-no-firmware.dtbo
kernel_comp_addr_r or kernel_comp_size is not provided!
4:      microSD (debug)
Retrieving file: /Image.gz
14474447 bytes read in 633 ms (21.8 MiB/s)
append: console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000 root=/dev/mmcblk1p3 ro rootfstype=ext4 rootwait net.ifnames=0
Retrieving file: /k3-am625-beagleplay.dtb
64468 bytes read in 10 ms (6.1 MiB/s)
kernel_comp_addr_r or kernel_comp_size is not provided!
5:      microSD
Retrieving file: /Image.gz
14474447 bytes read in 633 ms (21.8 MiB/s)
append: root=/dev/mmcblk1p3 ro rootfstype=ext4 resume=/dev/mmcblk1p2 rootwait net.ifnames=0 quiet
Retrieving file: /k3-am625-beagleplay.dtb
64468 bytes read in 11 ms (5.6 MiB/s)
kernel_comp_addr_r or kernel_comp_size is not provided!
SCRIPT FAILED: continuing...
64468 bytes read in 10 ms (6.1 MiB/s)
Scanning disk [email protected]...
Scanning disk [email protected]...
** Unrecognized filesystem type **
Card did not respond to voltage select! : -110
Scanning disk [email protected]...
Disk [email protected] not ready
Found 7 disks
No EFI system partition
BootOrder not defined
EFI boot manager: Cannot load any image
switch to partitions #0, OK
mmc0(part 0) is current device
Scanning mmc 0:1...
Found /extlinux/extlinux.conf
Retrieving file: /extlinux/extlinux.conf
1561 bytes read in 5 ms (304.7 KiB/s)
BeaglePlay eMMC (extlinux.conf) Options
1:      BeaglePlay eMMC Recovery
2:      BeaglePlay eMMC disable BCFSERIAL
3:      BeaglePlay copy eMMC to microSD
4:      BeaglePlay eMMC (default)
5:      BeaglePlay eMMC Mikrobus
Enter choice: