On Tue, Mar 7, 2017 at 9:45 PM, ags <[email protected]> wrote:
> The mechanism for generating an interrupt from a PRU to the A8 (host) is > well-documented. Is there a way to send an interrupt (one of the 64 system > interrupt events documented in the PRU-ICSS literature) from userspace? > No, there are no such things as userspace interrupts, period. > > From reading the TI documentation, the only two that seem to be candidates > are two "mailbox" interrupts. I recall reading something about a version > of the remoteproc (or RPMsg, or virtio) drivers that utilized these > mailboxes, but ultimately abandoned them as they are not available on all > platforms. (that may be incorrect). > > Setting a flag in PRU DRAM or shared RAM is clearly a method that will > work. However, it appears that polling DRAM or shared RAM is a multi-clock > task; if a PRU system interrupt can be generated, it can be polled in one > clock by examining R31 bits 30/31 (if configured correctly). Is this > possible? > I get the feeling however that you're misunderstanding the purpose of an interrupt. An interrupt is a way for hardware to let software know, something has happen that may require attention. Either way you wold probably be better off thinking in the context of setting a bitfield, or in this case, a single bit. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORoM%2BD0Fd8R2TvFdzbbrcWOMs9mvS3HvpKbNZmNAQqzD2w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
