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?
>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? -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/220a52c3-cc09-4868-b35a-3b8b3ebc7f7c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
