Date: Sat, 01 Mar 2014 12:38:41 -0700 From: Ian Lepore <ian@FreeBSD.org> To: Warner Losh <bsdimp@gmail.com> Cc: Tim Kientzle <tim@kientzle.com>, freebsd-arm <freebsd-arm@FreeBSD.org> Subject: Re: A unified imx6 kernel config, old WANDBOARD-* configs going away Message-ID: <1393702721.1149.230.camel@revolution.hippie.lan> In-Reply-To: <05B4DCBB-E8A9-4EC1-B50C-3D2965828BF1@bsdimp.com> References: <1393594966.1149.161.camel@revolution.hippie.lan> <F38D0A2F-D2AF-426D-8515-BD111501B2A2@kientzle.com> <1393688945.1149.225.camel@revolution.hippie.lan> <05B4DCBB-E8A9-4EC1-B50C-3D2965828BF1@bsdimp.com>
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On Sat, 2014-03-01 at 12:01 -0700, Warner Losh wrote: > On Mar 1, 2014, at 8:49 AM, Ian Lepore <ian@FreeBSD.org> wrote: >=20 > > On Sat, 2014-03-01 at 07:41 -0800, Tim Kientzle wrote: > >> On Feb 28, 2014, at 5:42 AM, Ian Lepore <ian@freebsd.org> wrote: > >>=20 > >>> I've added a new imx6 unified kernel config named IMX6. It has no > >>> compiled-in fdt, and can boot all three flavors of Wandboard when u= -boot > >>> and ubldr load a dtb file. Folks should start using it and eventua= lly > >>> the WANDBOARD* configs will go away when nobody needs them anymore. > >>=20 > >> Nice! Another step towards GENERIC ARM. >=20 > Yes, many more steps to go, but if we can have a generic kernel per SoC= that=A2s > miles ahead of where we are now. >=20 > >>> the .dtb file in your /boot/kernel or /boot/modules directory, and = ubldr > >>> will load it from there, using the filename set in the u-boot env v= ar > >>> fdt_file. > >>=20 > >> Using a U-Boot env var to specify the FDT is a nice idea. >=20 > When U-Boot itself doesn=A2t have the DTB already in the image, yes. The way wandboard's boot setup works, the u-boot binary just provides a default filename for fdt_file and their image has the file on the msdos partition, and they use an env-var script to load the file before loading the kernel. I removed all that cruft from the environment and let ubldr load the file named in fdt_file from the ufs filesystem. -- Ian
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