> > Nice idea! On Sparc the timer can be configured to work in 64-bit > > mode, so could the ptimer_get/set_count be changed to use 64-bit > > values? > > Perhaps the width could be made runtime configurable, e.g. 16, 24, 32, > 64-bits as required for a given system, since there are other targets > which may need differring widths (mind I haven't looked all too closely > at the code to see if it already handles this : ). Likewise, perhaps > up/down count can also be made runtime configurable, since, again, some > targets implement up counters. The logic is all the same in that > case, with just a difference in sign...
I don't think there's any point. A 64-bit countdown timer is sufficient to implement everything, and I'd expect the overhead is going to minimal. Converting a count-down timer into a count-up timer is trivial. The ARM timers are actually count-up timers. Paul
