Date: Mon, 30 Dec 1996 12:11:47 -0900 (AKST) From: hmmm <hmmm@alaska.net> To: freebsd-hackers <hackers@freebsd.org> Subject: Ints Message-ID: <Pine.GSO.3.93.961230120412.27357A-100000@calvino.alaska.net>
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this isn't particular to FreeBSD - but after searching - i don't know who else to ask! please reply via email - i am not currently a subscriber! Q: is there danger in servicing a lower priority pending interrupt while servicing the highest priority INT in the same ISR ? IE - are any interrupt functions/bits LATCHED - that may need to be cleaned up? for example - i have both COM ports tied to the same ISR - is there any danger in reading RxBuf1 (lower priority) while SERVICING an RxBuf2 INT? or - satisfying a TxBuf INT (lower priority) while taking care of RxBuf INT? OR - does eliminating any INTerrupt condition KILL all things related to that INTerrupt? thanks ahead of time ... ------------------------------------------------------------------------------ Sleep: a sign a caffeine deprivation ... http://www.alaska.net/~hmmm ------------------------------------------------------------------------------
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