Date: Thu, 16 Apr 1998 14:01:38 -0700 (PDT) From: Bernie Doehner <bad@uhf.wireless.net> To: Mike Smith <mike@smith.net.au> Cc: Bernie Doehner <bad@ece.WPI.EDU>, hackers@FreeBSD.ORG, buaas@wireless.net, bad@ece.WPI.EDU Subject: Re: Documentation of 2.2.5-RELEASE and 3.0 memory protection? Message-ID: <Pine.BSF.3.96.980416135731.339A-100000@shf.wireless.net> In-Reply-To: <199804162026.NAA01011@dingo.cdrom.com>
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[...] > > if_ed driver (some cards use shared memory, but in the ISA hole of > > A0000-100000), to the Digiboard driver (which I thought uses shared > > memory, but BELOW A0000). > > I don't understand you here - drivers are *inside* the kernel, and > behave completely differently to user-mode programs. > Are you writing a driver, or a user-mode program? This is a critical > difference. Using used too loose a definition. Our stuff is ALL user-mode programs currently and it appears to work (with one program using monochrome range for shared-memory, and the other using ISA hole memory) But we'd like to understand the kernel mechanisms better so that we can move/some of it into the kernel and turn it into real device drivers. Bernie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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