Date: Sat, 1 Mar 2014 20:21:45 -0700 From: Warner Losh <imp@bsdimp.com> To: Ian Lepore <ian@FreeBSD.org> 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: <CF149145-763C-4241-97BB-F0E18A01C057@bsdimp.com> In-Reply-To: <1393702721.1149.230.camel@revolution.hippie.lan> 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> <1393702721.1149.230.camel@revolution.hippie.lan>
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On Mar 1, 2014, at 12:38 PM, Ian Lepore <ian@FreeBSD.org> wrote: > 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 = eventually >>>>> 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 = var >>>>> 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. >=20 > 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. Very cool... Warner
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