Date: Sat, 26 Sep 2015 15:38:40 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Ian Lepore <ian@FreeBSD.org> Cc: freebsd-arm@freebsd.org Subject: Re: netboot configuration [was: Re: NFS Root with Raspberry Pi (nfs_diskless: no interface)] Message-ID: <12C96F79-2D70-408D-AD4C-F06F6B909AD3@cs.huji.ac.il> In-Reply-To: <1443209159.1224.361.camel@freebsd.org> References: <20150922052522.GA62140@gmail.com> <00C49FEB-E8EF-4469-85E2-0F901215CD11@cs.huji.ac.il> <20150923050414.GB43653@gmail.com> <91AAC64E-4C38-47AA-8910-48F7654A7524@cs.huji.ac.il> <20150923174445.GE43653@gmail.com> <CFAAFAE2-F0B2-431B-93C6-61D66464B7FD@cs.huji.ac.il> <1443105426.1224.272.camel@freebsd.org> <20150924163658.GC32257@gmail.com> <560438C5.3090404@selasky.org> <1443142468.1224.322.camel@freebsd.org> <FE458AF3-A9EE-46B1-89E3-1FB82E413E17@cs.huji.ac.il> <1443209159.1224.361.camel@freebsd.org>
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> On Sep 25, 2015, at 10:25 PM, Ian Lepore <ian@FreeBSD.org> wrote: > > On Fri, 2015-09-25 at 11:37 +0300, Daniel Braniss wrote: >>> On 25 Sep 2015, at 03:54, Ian Lepore <ian@FreeBSD.org> wrote: >>> >>> On Thu, 2015-09-24 at 19:54 +0200, Hans Petter Selasky wrote: >>>> On 09/24/15 18:36, Randy Westlund wrote: >>>>> On Thu, Sep 24, 2015 at 08:37:06AM -0600, Ian Lepore wrote: >>>> > [...stuff about problems netbooting...] >> >> hi Ian, >> can you help me here? >> I need the magics to get ubldr to boot from the net, >> i’m using an image built via crochet. >> >> cheers, >> danny > > I've been struggling with how to set up a new default u-boot environment > in our ports to make netbooting easier. The problem is that there are > as many ways to netboot as there are different people wanting to do it. > What I've been doing for years is loading both ubldr and the kernel from > nfs, by configuring my dhcp server to provide all the info needed (board > ip and netmask, server ip, ubldr file to load, and nfs root path), all > based on the mac address of the board. I've learned that doesn't work > well for most people who don't have easy control over their dhcp server. > > To try to keep this relatively simple, I'm going to assume that what > most folks want to do is: > > * Load ubldr from the sdcard that has u-boot on it (not from nfs). > * Make ubldr load the freebsd kernel from nfs. > * Use an nfs root filesystem. > > So I'm assuming you've got an nfs server already serving up the root > filesystem (I'm not going to detail configuring that here). That > filesystem must contain an /etc/fstab that includes the ip:/rootpath > entry for the root filesystem. In other words, even though the software > must already know the ip:/rootpath to find the fstab file, the file > still must contain a root path entry. (I find this annoying.) > > Now on the u-boot side you need to add a few lines to the uEnv.txt file > on the FAT partition (create the file there if it doesn't already > exist). You can configure a static IP address or get the IP from dhcp: > > For static IP (On RPi only, add one line: UserPreboot=usb start) > > loaderdev=net > rootpath=192.168.0.240:/wand > ipaddr=192.168.0.233 > netmask=255.255.255.0 > > > For DHCP (On RPi only, last line is: UserPreboot=usb start && dhcp) > > loaderdev=net > rootpath=192.168.0.240:/wand > autoload=no > UserPreboot=dhcp > > BTW, you may notice a Netboot command in the standard u-boot env. Do > NOT set bootcmd=run Netboot, that would make u-boot try to load ubldr > over the network, which requires running a tftp server. > > — Ian thanks! it almost worked :-) - UserPreboot didn’t work, probably because I have the wrong u-boot? stoping the boot, then typing usb start boot at the U-Boot> prompt saved the day! - if instead of boot I type dhcp, it tries to tftp u-boot, but I can’t figure out how to start it :-( in any case, great! now it would be nice if we pull resources and get this diskless stuff cleaned up danny
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