From owner-freebsd-hackers  Sun Dec  2 17:57:26 2001
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To: "Dragon Fire" <dragonfire820@mediaone.net>
Subject: Re: device object, driver object, cdevsw 
Cc: freebsd-hackers@FreeBSD.ORG
In-reply-to: Your message of "Sun, 02 Dec 2001 20:42:00 EST."
		<003e01c17b9c$0e571ff0$037d6041@gandalf> 
References: <003e01c17b9c$0e571ff0$037d6041@gandalf>  <000601c17b6b$7a89c190$037d6041@gandalf> <200112030128.fB31S0M62172@harmony.village.org> 
Date: Sun, 02 Dec 2001 18:57:18 -0700
From: Warner Losh <imp@harmony.village.org>
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In message <003e01c17b9c$0e571ff0$037d6041@gandalf> "Dragon Fire" writes:
: I am using stable not devfs for development.
: 
: In the Design and Implementation of the 4.4 BSD Operating System. Chapter 6
: states
: 
: Device Drivers
: 
: A device is divided into three main sections
: 1. Autoconfiguration and initialization routines
: 2. Routines for servicing I/O requests (the top half)
: 3. Interrupt service routines (the bottom half)
: 
: Would it be a fair analogy to say the KLD portion of the code equates to 1.,
: the cdevsw equate to 2., and the isr equate to 3.
: 
: I appreciate your response I'm just trying to get a thorough understanding.

Yes.  all three of these live in one file, usually done the same way I
do mine.

Warner

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