Date: Fri, 02 May 2014 12:01:09 +0300 From: "Sulev-Madis Silber (ketas)" <madis555@hot.ee> To: Ian Lepore <ian@FreeBSD.org> Cc: FreeBSD ARM <freebsd-arm@FreeBSD.org> Subject: Re: FreeBSD-10-STABLE hangs when booting from BeagleBone Black eMMC Message-ID: <53635ED5.6060508@hot.ee> In-Reply-To: <1398784968.22079.13.camel@revolution.hippie.lan> References: <CADH-AwHvaVqycykONkzRsj7oD3xSi8hszvc_Wf4obC=Y_qPiaQ@mail.gmail.com> <1398618984.61646.165.camel@revolution.hippie.lan> <CADH-AwE%2B5=A4aiqbTYqor1Any1JGNhz4LHOJwfyykYU92UpirQ@mail.gmail.com> <1398624759.61646.174.camel@revolution.hippie.lan> <CADH-AwG%2BsaqXO4FYG65WMOuFyDzjbhF=a=-p3Y3En3zbcgyd6A@mail.gmail.com> <1398648505.61646.189.camel@revolution.hippie.lan> <CAD44qMX%2BhoeZ6yBD0v52xfoo5CXiUHgMz9qLa-=qhGYhhPUt1Q@mail.gmail.com> <CADH-AwEHRKSx11yjC5%2BkmYA4Q3Oh4VWpp-pr31eWwNc0bf0vUw@mail.gmail.com> <1398732508.61646.245.camel@revolution.hippie.lan> <CADH-AwHQjieXo-WgHkrc2wxwELwvrkg2spYucsZzRegvx9wWsA@mail.gmail.com> <1398784968.22079.13.camel@revolution.hippie.lan>
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On 2014-04-29 18:22, Ian Lepore wrote:
> This may be the problem -- ubldr's behavior for finding and using dtb
> files is more complex than it used to be. It may be that it used to
> claim to find and use the u-boot dtb, but it was really using a static
> dtb compiled into the kernel. Now if u-boot provides a valid dtb it'll
> actually get used, even if kernel has a static dtb compiled in.
>
> If you remove the u-boot env var 'fdtaddr' then it will fall back to
> using a compiled-in dtb file instead of a loaded one.
>
> What I've been doing these days is installing my dtb files
> in /boot/modules or /boot/kernel and then setting the dtb file name in a
> u-boot env var named fdtfile. That makes ubldr find and load the named
> file in the place it finds the kernel.
>
> -- Ian
Nice, good suggestion. Now I have this "hack" in bb-uenv.txt:
------------------------------------------------------
uenvcmd=echo "[environment] delete fdtaddr"; env delete fdtaddr; setenv
loadfdt ''; setenv fdtfile "/boot/kernel/${fdtfile}"; echo
"[environment] loadfdt=${loadfdt}"; echo "[environment] fdtfile=${fdtfile}"
------------------------------------------------------
Not sure where FDT file should go? First I though maybe /boot/fdt...
then /boot/kernel seemed good place...
Also, maybe we should use this way of loading FDT in every platform it's
possible? No static FDT in kernel too. Ruins NFS boot, however...
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