Date: Sat, 25 Jan 2014 17:19:08 -0500 From: Glen Barber <gjb@FreeBSD.org> To: Warner Losh <imp@bsdimp.com> Cc: freebsd-arm@FreeBSD.org Subject: Re: Rasbperry Pi, what should TARGET_ARCH be? Message-ID: <20140125221908.GX52955@glenbarber.us> In-Reply-To: <EEBDA9FC-ADCC-4C0E-A224-BB0DA234E717@bsdimp.com> References: <20140125044043.GT52955@glenbarber.us> <EEBDA9FC-ADCC-4C0E-A224-BB0DA234E717@bsdimp.com>
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[-- Attachment #1 --] On Sat, Jan 25, 2014 at 10:50:45AM -0700, Warner Losh wrote: > > On Jan 24, 2014, at 9:40 PM, Glen Barber wrote: > > > Hi, > > > > I've been working on adding support for embedded systems to the release > > scripts, which set up a chroot to ensure a clean build environment, then > > runs Tim's Crochet scripts. > > > > For the RPI-B, recent updates to the build scripts work fine for > > 11.0-CURRENT and 10.0-STABLE. However, 10.0-RELEASE images fail to > > boot. > > If that worked, it worked by accident. > > > I showed output from 'uname -pm' out-of-band of an 11.0-CURRENT image, > > and was suspicious that the output showed 'arm arm', not 'arm armv6'. > > Warner had the same impression it should be 'arm armv6'. > > > > Hiren poked around the Crochet code, and saw that 'TARGET_ARCH=arm' is > > set for the RaspberryPi board by default. > > This is incorrect. > > > As a "just in case" experiment, I retried the 10.0-RELEASE code > > (release/10.0.0/) with TARGET_ARCH=armv6, and sure enough, it works. > > > > But, I don't know *why*. > > It works because that's the architecture that the RPi runs. > > > Is this a change between head/ and stable/10/ versus releng/10.0/ ? > > > > I can handle a differentiation between the branches with regard to this > > (sort of), but I want to make sure the correct TARGET_ARCH is being set > > across the different branches, so it can be handled properly in the > > build scripts, and usable images can be produced. > > The definition should be the same on both branches. You must use TARGET_ARCH=armv6 on all known branches to produce working code. You might get lucky and get TARGET_ARCH=arm and have it work, but that's most definitely not a supported configuration. > > > So, what should be used? And where? > > For RPi, TARGET_ARCH=armv6 everywhere on all branches >= 9. RPi isn't supported 8 and lower. > Thanks Warner. I appreciate it. Glen [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQIcBAEBCAAGBQJS5DhcAAoJELls3eqvi17QK9YP/0eDQiSiK+8P8kDqxWb5mtl9 FG0LSyD8YHeQVEdmXAfUeWZ0BecgMyliiYU5ObLm2Lb+sHptjYsH5O0sELFq5fbI 61FCLPyQrhZBI243zlOS0rOntYVAoc6HxzFOThX8PLx7+vNtFgv8gBXUqJ+QHixc 2n08/dRPbIEwCtiObVbhBxAY1R8p/3SonWIMxdEjMejQMIrNwANDldyNNlOXZxVp Tzo/rM+arxQCahf6kJUcxZ3fX9s47nWOtWUOdSRGpKnVVaL8pyrHYymZIUw+TTuJ rvqMjDY0MYFagCC52agx4wOnnm3DMfphrk2p90B7zB6lDecboZyl7JunRymhF+Da iZ9eP7CeX4sQGdgjL3M1npDAR7Tasp8AtUP1mu170hrLl9MjuF4kot/6jy8rvlSk 2dGedKZktlo/jXRJu609v4OPO8NBQGJa1RZQtQfmNAFahgi6r3U9muaPA0IcFqvE XmXyWsTgMa6n6HVJULDZWnwWcYcWWVVGmXMcumFZeD5OC+CA1FRzPZVYH1Ol6zaj 5gCTyhHpDzxoWJMrFvth8Zt+5inFvFJoflfkP8JLgX4qEARYnjFdaLWJUW9tuika I9DPSPPJVe5/67vNeeI6Yz5RwU3YL0jddeBuD4NHJD8yh8gaJGtxGlTcrlXh+MeB f9hY8TxpMW9EG3FIveie =eLlb -----END PGP SIGNATURE-----help
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