Path: utzoo!utgpu!water!watmath!clyde!rutgers!cmcl2!brl-adm!umd5!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: BSD internals/ether/software intrs
Message-ID: <10346@mimsy.UUCP>
Date: 26 Jan 88 07:31:38 GMT
References: <3522@megaron.arizona.edu> <402@sering.cwi.nl> <13676@oliveb.olivetti.com>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 20

In article <13676@oliveb.olivetti.com> ilcu@icoven.olivetti.com
(Daniela Papa) writes:
>I'm NOT lazy and I'd love to find a book like Lion's on BSD.......

Patience!  (But the book is not mine.)

And with that as a teaser, a bit about network software interrupts.
These are done with whatever the machine has as a software interrupt:
on the Vax and the Tahoe, using the Software Interrupt Request
Register, SIRR.  There is a macro called `setsoftnet', defined as

	#define	setsoftnet()	mtpr(SIRR, 12)

which asks the machine to generate an interrupt at IPL 12 as soon
as it may.  There is another macro called `schednetisr', which sets
a bit in a global variable and then does a setsoftnet().  This is
explained in <net/netisr.h>.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris