From owner-freebsd-arm@FreeBSD.ORG Thu Jan 31 18:04:14 2013 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 8761BB35 for ; Thu, 31 Jan 2013 18:04:14 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from mail-oa0-f43.google.com (mail-oa0-f43.google.com [209.85.219.43]) by mx1.freebsd.org (Postfix) with ESMTP id 4A5BA895 for ; Thu, 31 Jan 2013 18:04:14 +0000 (UTC) Received: by mail-oa0-f43.google.com with SMTP id l10so3301369oag.30 for ; Thu, 31 Jan 2013 10:04:07 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:sender:subject:mime-version:content-type:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to:x-mailer:x-gm-message-state; bh=KZB2oYY94UZjJUT4mPYl0nCpNW+utC7yjV5XG4JaGzk=; b=hF2pWrneGLrtY4C6W3g1wpwanvkaxHA4qKxqABlhCV7ROeReYBGs5TM/wS0mfAVt/K fRnuQ9hZsfoiXmwIs6S6vIcpoKuEZvLL9QOAfqTDlaAH6Kz6mY+TVVx+XbFHTgL8ytb7 nqefve9qmbz928X9q3teNlzjs2RGkl1zSSZKl3uWlPEAF6r3C0jQbLfkN7gf+a0opB7G S2vxaaNjMhVvZk1wiM+i3ErYGXi38fa10xq+4/KldzXgStQceO0R3xeS/8iNuc12uhJW tg3NRZoiQ/A09o1FY6N6fHvTcbsfvAG/tewKmkvSj4+x+28wuEZ0PkPWwHp8Kw0NA57h WzRw== X-Received: by 10.60.172.84 with SMTP id ba20mr7192993oec.10.1359655447668; Thu, 31 Jan 2013 10:04:07 -0800 (PST) Received: from fusionlt2834a.int.fusionio.com ([209.117.142.2]) by mx.google.com with ESMTPS id e1sm6460249oef.4.2013.01.31.10.04.05 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 31 Jan 2013 10:04:06 -0800 (PST) Sender: Warner Losh Subject: Re: SD card -image- for the beaglebone Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: text/plain; charset=us-ascii From: Warner Losh In-Reply-To: <1359646574.93359.327.camel@revolution.hippie.lan> Date: Thu, 31 Jan 2013 11:04:03 -0700 Content-Transfer-Encoding: quoted-printable Message-Id: References: <510A4F5B.7000407@g7iii.net> <1359646574.93359.327.camel@revolution.hippie.lan> To: Ian Lepore X-Mailer: Apple Mail (2.1085) X-Gm-Message-State: ALoCoQmnXs8axPxWCv8Y7rJwpMACPWTYtvIcX35TZ56LPt9nSI6zM/6fqJYz6p6ntqykazXawH5I Cc: freebsd-arm@FreeBSD.org X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 31 Jan 2013 18:04:14 -0000 On Jan 31, 2013, at 8:36 AM, Ian Lepore wrote: > On Thu, 2013-01-31 at 11:02 +0000, Iain Young wrote: >> Hi Folks, >>=20 >> I have just taken delivery of a few Beaglebones that I am intending = to >> do some NTP Work. With FreeBSD having one of the better reputations >> with regards to Time and PPS etc, I thought I would install FreeBSD = on >> at least one of them. >>=20 >> Unfortunately, all of the guides I've found all assume you have a >> FreeBSD box already running. Unfortunately, I don't, and nor do I = have >> a spare x86 box to do so. >>=20 >> Does anyone have an *image* of a base install for a 4 Gig microSD >> card that I can download ? Preferably with ssh and dhcp installed >> (yes, I know about blowing away the keys), as that would avoid having >> to rely on the console. >>=20 >> Quite happy to rebuild the kernel and world afterwards (yes, I know I >> need an 8 Gig SD card), but it's just this bootstrapping problem = thats >> an issue... >>=20 >=20 > So you're interested in a PPS driver for BeagleBone? That would be = fun > to play with, I wonder what the BB's timer hardware looks like? It'd = be > easy enough to do with a gpio interrupt I suspect, but the timing geek > in me can't resist going for the nanosecond-accurate measurements when > possible, even if it is kind of pointless for millisecond-accurate = NTP. You can drive ntpd's accuracy to microsecond or tens of microseconds = with appropriate hardware. nanosecond accuracy help to steer the = frequency estimate the kernel uses for time keeping, but that only helps = a little since its frequency estimates are computed over hundreds of = seconds. Warner=