Date: Sat, 22 Nov 2014 04:06:52 +0100 From: Bernd Walter <ticso@cicely7.cicely.de> To: Ian Lepore <ian@freebsd.org> Cc: freebsd-arm@freebsd.org Subject: Re: Utilite support Message-ID: <20141122030652.GD15350@cicely7.cicely.de> In-Reply-To: <1416584156.1147.259.camel@revolution.hippie.lan> References: <ADE49E48-60F7-4626-BB1E-169B8478C842@waschbuesch.de> <1416503998.1147.185.camel@revolution.hippie.lan> <F88BEE72-032A-4A34-ABE7-679368694540@waschbuesch.de> <1416584156.1147.259.camel@revolution.hippie.lan>
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On Fri, Nov 21, 2014 at 08:35:56AM -0700, Ian Lepore wrote: > On Fri, 2014-11-21 at 14:04 +0100, Waschbüsch Martin wrote: > > > Am 20.11.2014 um 18:19 schrieb Ian Lepore <ian@FreeBSD.org>: > > > > > > There is some chance that "it might just work." Actually a better > > > chance now than when I originally wrote that. :) Try using crochet for > > > wandboard and in the wandboard kernel config file change FDT_DTS_FILE to > > > "imx6q-cm-fx6.dts". There's a good chance you'll end up with a bootable > > > image on an sdcard. > > > > > > You will need a serial console for debugging, we don't support a video > > > console yet on imx6 systems. The Compulab FitPc2 x86 systems need a > > > special serial debugging cable that you have to buy separately. I hope > > > that's not also the case with Utilite. > > > > > > -- Ian > > > > Hello Ian, > > > > I tried to follow your suggestion, but realized that there might be > > a significant difference between Wandboard and Utilite: Utilite does > > not read u-boot from disk. Instead, it holds u-boot as 'firmware' in > > a flash module. > > Don't know why I had not realized this earlier, but anyway, I guess > > if I had compiled it before, I would have noticed. So far I had played > > around with pre-built Wandboard images... > > What this means is that the current crochet scripts will fail because > > the u-boot compilation for cm-fx6 will not output a u-boot.imx file and > > is probably not needed anyway. > > What I will try next is make a copy of crochet's boards/Wandboard to > > boards/Utilite and try to adapt the setup.sh script. > > Questions: > > Are there requirements that u-boot must meet in order to boot ubldr? If > > so, I'll have to look into rebuilding u-boot plus flashing that. > > > > Martin > > I'll attach the patches I use for building u-boot (I use the uboot for > Technexion EDM modules for Wandboard too; wandboard uses technexion > modules). The API option is the main one for running ubldr. > > Check whether the uboot on the Utilite has the 'bmode' command. You may > be able to insert an sdcard with a new uboot and freebsd on it and say > "bmode mmc0" (or mmc1 or whatever) and the system will reset and boot > from the sdcard instead of the flash. > > My Cubox i4pro arrived yesterday. Its uboot doesn't have the API option > (they almost never do; linux doesn't use it). I tried compiling the dtb > into the kernel and launching it directly, and that fails because the > cubox dts doesn't have a memory=<> property. I think the uboot probably > figures out the amount of ram and modifies the dtb it passes to the > kernel. Ick. I hacked around that and now the kernel hangs as soon as > initarm() installs new page tables. So how is that uboot thing handled in this case? Can you go and compile uboot from the same source as for a wandboard, or do we need to have different source for each of the boards? As you know I do own a bunch of different iMX6 boards and I'm happy to do test boots and minor tweaking (if required by readin gschematics) on all of them. > So the barriers to launching a non-linux kernel using just what a system > vendor provides are even bigger than I had imagined. :-( -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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