Date: Thu, 21 Feb 2013 10:01:47 -0700 From: Warner Losh <imp@bsdimp.com> To: Tim Kientzle <tim@kientzle.com> Cc: george@ceetonetechnology.com, freebsd-arm@freebsd.org, Brett Wynkoop <wynkoop@wynn.com>, Ian Lepore <ian@freebsd.org> Subject: Re: The Next BeagleBone Better & Faster for Less! Message-ID: <5B57B232-3DEE-42A4-9623-58E7D75291B9@bsdimp.com> In-Reply-To: <A4D0270C-35C0-4B4B-87C0-D8990490A8B9@kientzle.com> References: <CANuCnH9XP3Jn30EWCuZ0AmQF6MA4q4U9GUB7LU=XXZEdp7ZJ8g@mail.gmail.com> <5125A73F.10802@ceetonetechnology.com> <20130221011346.3c376117@ivory.wynn.com> <48679DB0-7A2B-4617-BAA3-30C21F3CD61B@bsdimp.com> <1361458105.1185.19.camel@revolution.hippie.lan> <B71C80C0-0835-403C-B196-5343AD3247FC@bsdimp.com> <1361459858.1185.25.camel@revolution.hippie.lan> <A4D0270C-35C0-4B4B-87C0-D8990490A8B9@kientzle.com>
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On Feb 21, 2013, at 9:58 AM, Tim Kientzle wrote: >=20 > On Feb 21, 2013, at 7:17 AM, Ian Lepore wrote: >=20 >> On Thu, 2013-02-21 at 07:58 -0700, Warner Losh wrote: >>> On Feb 21, 2013, at 7:48 AM, Ian Lepore wrote: >>>=20 >>>> On Wed, 2013-02-20 at 23:49 -0700, Warner Losh wrote: >>>>> On Feb 20, 2013, at 11:13 PM, Brett Wynkoop wrote: >>>>>=20 >>>>>> On Wed, 20 Feb 2013 23:49:03 -0500 >>>>>> George Rosamond <george@ceetonetechnology.com> wrote: >>>>>>=20 >>>>>>> On 02/20/13 23:27, Alie Tan wrote: >>>>>>>> Just got a news about new Beaglebone: >>>>>>>>=20 >>>>>>>> http://beagleboard.org/unzipped/ >>>>>>>=20 >>>>>>> Wow. Although personally, I could do without the HDMI. >>>>>>>=20 >>>>>>> It would be ideal there was a stock FBSD image for them to = provide for >>>>>>> purchasers... as in official on their www site as an alternative = to >>>>>>> Linux. >>>>>>>=20 >>>>>>> g >>>>>>=20 >>>>>> Greeting- >>>>>>=20 >>>>>> We need working USB support to contribute that to their site. >>>>>>=20 >>>>>> Is this new bone going to be the same as the old bone, but with = video, >>>>>> in other words will current kernels run or will the hard core = kernel >>>>>> folks have to rework things? >>>>>=20 >>>>> We'll likely have to rework thing, at least if we want to run out = of flash on the card. it has a new flash chip that has micron markings = on it. Sure would be nice to know what, exactly, that chip is=85 >=20 > I haven't found what SoC the new BeagleBone is > using, but the AM3359 used on the original BeagleBone > does support hardware ECC in the memory controller. >=20 > "Section 7.1.1.1 GPMC (General Purpose Memory Controller) Features > =85 > =95 Up to 16-bit ECC support for NAND flash using BCH code (t=3D4, 8 > or 16) or Hamming code for 8-bit or 16-bit NAND-flash, organized > with page size of 512 bytes, 1K bytes, or more." >=20 > There is also an "Error Location Module" documented in Section 7.4 > of the TRM which seems to be the component that actually > implements the ECC coding and works with the GPMC. >=20 > Definitely a chunk of work to integrate, but it doesn't appear > to require that we implement software ECC. Software BCH is very slow in comparison to hardware.. Warner
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