Benjamin Herrenschmidt wrote: > On Wed, 2005-06-01 at 13:50 -0300, Marcelo Tosatti wrote: > > Hrm... removing a PCMCIA card triggers mchecks ? that is bad... With > "proper" PCMCIA controllers, those are swallowed properly when the card > is removed. The eating of the machine check is a bit too hackish to my > taste... Better is to "not do that" by making sure the legacy crap isn't > trying to tap unexisting ports, but then, if PCMCIA is also a > problem... >
8xx is not proper in any way whatsoever :) There's no way to fix this thing with simple software hacks. For example take a PCMCIA driver that's minding it's own businees, when someone yanks the card out. cli() ... inb(xxx) ... <----- card is yanked here ... inb(yyy) ... <----- MCE here sti() > >>1) why does the current PowerMac version covers only inb() and not outb() ? >>I had to add outb() exception table entries for 8xx. > > > Not sure, maybe historical loss ? :) You should CC paulus > > >>2) Is the same wanted for other embedded PPC's? > > > It's up to you. It slows down those IOs, but on the other hand, inX/outX > aren't supposed to be very common anymore, at least not with "fast" > devices, and the IO itself is usually an order of magnitude slower than > doing those syncs... > Fast ISA I/O. :) > >>3) How to make the misc.S exception entries and additional instructions >>selectable only on the platform who need it? #ifdef does not sound >>a good idea. I wouldn't mind... >> >>Nevermind the "#ifdef CONFIG_ALL_PPC" crap - that needs to be done >>properly. >> >> Regards Pantelis P.S. Good job marcello :)
