From owner-freebsd-hackers Fri May 10 11:15:31 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mail.speakeasy.net (mail16.speakeasy.net [216.254.0.216]) by hub.freebsd.org (Postfix) with ESMTP id 4DDAA37B403 for ; Fri, 10 May 2002 11:15:25 -0700 (PDT) Received: (qmail 22610 invoked from network); 10 May 2002 18:15:22 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail16.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 10 May 2002 18:15:22 -0000 Received: from laptop.baldwin.cx (gw1.twc.weather.com [216.133.140.1]) by server.baldwin.cx (8.11.6/8.11.6) with ESMTP id g4AIF4F43366; Fri, 10 May 2002 14:15:05 -0400 (EDT) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.2 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <3CDBE300.2AED36C2@elischer.org> Date: Fri, 10 May 2002 14:14:55 -0400 (EDT) From: John Baldwin To: Julian Elischer Subject: Re: nextboot loader diff Cc: hackers@freebsd.org, Gordon Tetlow , Michael Smith , Terry Lambert , Jonathan Mini 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 On 10-May-2002 Julian Elischer wrote: > You also had to have: > 1/ a way of setting the boot specification list from the running system. > 2/ a simple and unlikely-to-break method of ensuring that if the boot did NOT > succeed, it did something DIFFERENT next time. > 3/ the ability to read the specification information regardless of the state > of the first filesystem (e.g. completely trashed). If / is trashed, you can't load a kernel or loader from it anyways. > 4/ The ability to specify a filesystem on another planet^H^H^H^H^H^Hdisk. Something you've missed in this version of nextboot is: 5/ work on more than just i386 > My decisions were: > A) make boot0 do the actual load of the spec from block1 immediatly after it > had read block0.. All teh registers were set up correctly to read the next > block. > block1 is almost alway unused, and if it was used it wouldn't have the > correct > magic numbers and would be ignored. This only works on i386. -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message