[LinuxBIOS] RESEND: v3 patch for console functions, and mods to lib/lar.c to support a void * parameter for running functions.

ron minnich rminnich at gmail.com
Thu Jan 3 19:52:14 CET 2008

On Jan 3, 2008 10:03 AM, Stefan Reinauer <stepan at coresystems.de> wrote:

> Will this not lead to the CPU consuming cycles and becoming/staying
> really hot?

yeah but, hey, it should never happen. CPUs don't melt any more when
you push them that hard anyway, usually they slow themselves down or
in some cases reset. I don't think it's a real issue.

Also, recall that it will be doing a lot of IO, not computing pi :-)

> Can't we clear the FIFO any other way and go to CPU hlt afterwards?

No, because of JTAG. I've had really terrible problems with JTAG
debuggers when CPUs halt. Even a tight loop (while (1);) can be hard
to break into on some CPUs.  But if the CPU is in a
call/return-with-IO type mode, it is pretty easy to grab it with JTAG,
stop it, and debug it.



More information about the coreboot mailing list