Has anyone had issues with serial when running the test suite on a
Raspberry Pi 3b?

Currently I am following the blog post:

https://research.csiro.au/tsblog/sel4-raspberry-pi-3/

In the seL4test project I have successfully compiled
sel4test-driver-image-arm-bcm2837 from rpi3_debug_xml_defconfig.  Along
with this I have the following files: bootcode.bin, start.elf,
u-boot.bin, and config.txt.

Bootcode.bin and start.elf are from the current Raspian firmware.
Config.txt just contains a line to enable UART ("enable_uart=1") and one
to point and u-boot.bin ("kernel=u-boot.bin").  And per the comment
section of the seL4 post I downgraded the version of u-boot to before
March 2017 (currently using Jan 2017).

I am not deviating from the blog posting but I am experiencing an issue
not mentioned.  I have no serial output (I do have a u-boot terminal
prompt through HDMI, so I can load/boot the binary).  When I boot seL4 I
receive the misaligned cache messages (through HDMI) and then it hangs.
Without serial I have no eyes to see if the seL4 tests are running.

Other than wiring into the RPI3 UART (GND/TX/RX on pins 6/8/10) and
enabling UART in config.txt is there another step I'm missing?

Thanks for any direction you can point me in,
Steve

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