Date: Sun, 7 Apr 2013 09:57:42 -0600 From: Warner Losh <imp@bsdimp.com> To: Tim Kientzle <kientzle@freebsd.org> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: "Beyond Buildworld" (was Re: RFC: "Crochet" build tool) Message-ID: <E79BA5F4-1B7E-437E-A61A-2B0D058F8756@bsdimp.com> In-Reply-To: <6B335467-513B-43DD-B309-82F92AF349CC@freebsd.org> References: <CFBA557F-3DB9-40BA-B222-8E8C67707C9B@freebsd.org> <5DFA61DB-70E4-4C3D-ACA0-995A175706C8@neville-neil.com> <5151B454.9090402@ceetonetechnology.com> <1CBF1416-3237-4DCE-8D61-7E998265C887@neville-neil.com> <1364311809.36972.27.camel@revolution.hippie.lan> <CAJ-Vmomcaoe4cBFtFbXHSe2ygWA9JZnMkE_zoy80unuT-L1Axg@mail.gmail.com> <5151D045.80305@thieprojects.ch> <CAJ-Vmomk0aGykV2Zv_9nW9Lg9THHspkfjHhiu7dEz1k1nPAibw@mail.gmail.com> <5151D9DB.7050001@thieprojects.ch> <167CF57D-01E3-4857-BF0E-C40B00FED226@netgate.com> <CAJ-VmokxSYqy4Zr1wtN=Ln4-2wJybqGeh_LSAC1tNM44DjTF1w@mail.gmail.com> <515ADB81.7090908@freebsd.org> <C271E400-CAE1-4118-ADF8-A8CA72B25972@kientzle.com> <515DF177.9060907@freebsd.org> <4DC4C47C-D503-4155-8FAF-6D5C88D8F67C@freebsd.org> <CAJ-Vmon7dB3h3pX3x4GS0rJB1zeszQubo7L4ahPAqCkFRpe2Aw@mail.gmail.com> <8FCD7391-B9E3-478A-86E8-4414F750804D@freebsd.org> <50CC112D-2B90-4E66-9D5F-829274D041D7@bsdimp.com> <94846836-83B2-483C-8003-466563F50D17@freebsd.org> <1F1CA680-6! F25-42A 3-8AC5-9F65418450B4@bsdimp.com> <6B335467-513B-43DD-B309-82F92AF349CC@freebsd.org>
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On Apr 6, 2013, at 11:22 PM, Tim Kientzle wrote: >=20 > On Apr 6, 2013, at 7:19 PM, Warner Losh wrote: >=20 >>=20 >> On Apr 6, 2013, at 7:10 PM, Tim Kientzle wrote: >>=20 >>> On Apr 6, 2013, at 2:03 PM, Warner Losh wrote: >>>=20 >>>> Most boards have a perfectly good boot loader already, but >>>> some like the popular RPi don't. >>>=20 >>> Neither does the BeagleBone, Pandaboard, nor I suspect >>> many of the other "hobbyist" boards that people would really want >>> pre-built images for. >>=20 >> I don't believe this is the case for most uboot-based boards.... It = sure looks like the mars board I just got has a boot loader, I think = uboot, but I need to finish some soldering to confirm. >>=20 >>>> Thankfully, the images for the boot loaders tend to be separable >>>> from the main image that people load on them and run/boot. >>>=20 >>> All of the boards mentioned above require a boot partition >>> and boot loader chain as part of the main image. >>=20 >> Require, or that's one of many ways to update them? The usual way in = all the boards I've dealt with is that one generally doesn't update the = boot partition, but you do update the kernel and root partitions = (possibly with repartitioning). Are you sure that you are required to = include the primary boot loader when updating? >=20 > The RPi, BeagleBone, and PandaBoard do not have onboard flash. >=20 > They all boot from SD card and require that the SD card > have an MSDOS FAT partition containing the boot loader. Ah, the light goes on... Most of the cards I've dealt with have actual = flash, but can boot in this mode in a recovery mode... Warner=
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