I am experimenting with wscons on the Atari. However, one of the first
problems arising is the initialisation of the console. The vga_cnattach()
function uses bus_space_map() to map in the registers. On the Atari,
uvm_km_valloc() is used in bus_space_map() to allocate a VA. When looking
at main(), you will see that the console is initialised before uvm_init()...

Has anyone ideas of how to handle this gracefully?

Leo.