From owner-freebsd-hackers Thu Dec 13 23:57:29 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from rover.village.org (rover.bsdimp.com [204.144.255.66]) by hub.freebsd.org (Postfix) with ESMTP id CC90F37B41B; Thu, 13 Dec 2001 23:57:17 -0800 (PST) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.11.3/8.11.3) with ESMTP id fBE7vGa94528; Fri, 14 Dec 2001 00:57:17 -0700 (MST) (envelope-from imp@harmony.village.org) Received: from harmony.village.org (localhost [127.0.0.1]) by harmony.village.org (8.11.6/8.11.6) with ESMTP id fBE7vGM50995; Fri, 14 Dec 2001 00:57:16 -0700 (MST) (envelope-from imp@harmony.village.org) Message-Id: <200112140757.fBE7vGM50995@harmony.village.org> To: Steve Price Subject: Re: MMU-less FreeBSD Cc: hackers@FreeBSD.ORG In-reply-to: Your message of "Thu, 13 Dec 2001 21:43:52 CST." <20011213214352.C597@bsd.havk.org> References: <20011213214352.C597@bsd.havk.org> <20011213174347.V597@bsd.havk.org> <200112140119.fBE1JgM49561@harmony.village.org> Date: Fri, 14 Dec 2001 00:57:16 -0700 From: Warner Losh Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message <20011213214352.C597@bsd.havk.org> Steve Price writes: : On Thu, Dec 13, 2001 at 06:19:42PM -0700, Warner Losh wrote: : > : > Hard. Lots of stuff relies on mmap, which basiclly requires an MMU or : > other tricks. The other tricks can be somewhat expensive... : : That's sort of what I figured. WRS and possible others use BSD : as a basis for their embedded OS on archs without an MMU, right? Not sure. : Got any pointers to these "tricks" you talk about? Thanks. Maybe the easiest way to find out about them would be to look at the uclinux stuff. It uses them. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message