[coreboot] [h8dme-fam10] acquiring coreboot skills from scratch somewhat daunting
Arne Georg Gleditsch
arne.gleditsch at numascale.com
Thu Jun 10 22:48:17 CEST 2010
Joe Korty <joe.korty at ccur.com> writes:
> Hi Arne,
> First first applied only the memset change then I applied the whole patch.
> The memset-only change did indeed speed up the memset. It is now
> instantaeous. The speedup seems too great to me, it implies that I've
> no-oped memset somehow.
Well, RAMTOP is what, 16MB? DDR2 (peak) transfer rates are 100-500
times that per second. There's reason that memset operation should be
taking any noticeable amount of time.
> Then I applied the whole patch. I had to change the "#if CONFIG_ARCH_X86"
> to "#if 1" as CONFIG_ARCH_X86 doesn't seem to be set. With that single
> change to your patch I see a speed-up to 'no delays, anywhere'; but now
> the execution patch is quite a bit different, we are in a warm reset
> infinite loop.
That's interesting. What's happening at the end there, before the warm
More information about the coreboot