On Tue, 17 Jun 2003, Ladislav Michl wrote: > Idea is to have only one way for printing kernel messages. In case of Indy, > O2 and SNI RM200 "arc" console will do it. Here you can find where should > be early console initialized: > http://marc.theaimsgroup.com/?l=linux-kernel&m=105519188505235&w=2 > As Juan pointed out setup for such console is actually a nop and one is > supposed to enable this feature only when debugging kernel. DEC prom console That's a valid point, as long as enabling it does not require a reconfiguration. > however needs some setup to determine REX entry points. early console is > currently used on sh, alpha, x86_64 and ia64 architectures. Btw, see comment > at the top of arch/sparc/prom/printf.c The DEC's entry points are a part of the problem only -- to support a generic kernel, we need to move early_printk setup after setup_arch(), as the level of variation is huge then.. There is also that minor implementation problem -- how to pass varargs from printk() to ROM's printf()? At least the firmware of the DECstation implements a full-featured printf() as in the C library. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
