Function _fbcon_print 

pub fn _fbcon_print(args: Arguments<'_>)

Print formatted text to the framebuffer console.

Silently returns if fbcon has not been initialized yet or if output has not been enabled (boot messages go to serial only for performance).

Text is written to the cell grid (fast RAM) only. Call flush() to blit pending changes to the hardware framebuffer. This decoupling allows multi-line output (e.g. help) to accumulate in RAM and then hit the slow MMIO path only once.