On Wed, Jul 18, 2018 at 10:17 AM, Joel Sherrill <j...@rtems.org> wrote: > > > On Wed, Jul 18, 2018 at 12:31 AM, Sebastian Huber > <sebastian.hu...@embedded-brains.de> wrote: >> >> Hello Amaan, >> >> On 17/07/18 19:18, Amaan Cheval wrote: >>> >>> Hi! >>> >>> Now that I'm working on the clock driver, we need to pick what we >>> support first. Our options in brief are: >> >> >> The clock driver needs an interrupt. What is the status of the interrupt >> controller support in the BSP? >> >> For timekeeping we use a port of the FreeBSD timecounter in RTEMS. You may >> have a look at the FreeBSD timecounter for this architecture, e.g. >> sys/x86/x86/tsc.c. I looks quite complicated. I would not take to much care >> about legacy support, e.g. ignore hardware which is older than five years?. > > > That's not a good rule for PCs at all. The APIC was first introduced as an > external controller with the i486, > Based on your rule, we wouldn't support it even though it is the most likely > choice. >
I believe he meant ignore hardware that is not available from products in the last five years. > Avoid things that are deemed legacy. The starting point for this is the old > PC > System Design Guide. > > https://en.wikipedia.org/wiki/PC_System_Design_Guide > > If it was deemed obsolete in PC2001, then you definitely want to avoid it. > Those > things are just now really disappearing. > This is consistent with my interpretation. > --joel > >> >> >> >> -- >> Sebastian Huber, embedded brains GmbH >> >> Address : Dornierstr. 4, D-82178 Puchheim, Germany >> Phone : +49 89 189 47 41-16 >> Fax : +49 89 189 47 41-09 >> E-Mail : sebastian.hu...@embedded-brains.de >> PGP : Public key available on request. >> >> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. >> > _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
