On Sat, Jun 27, 2015 at 6:41 AM, <[email protected]> wrote:
> Can I clarify/sanity check this one please?
>
>
>
> As of the January (or thereabouts) timeframe, u-boot has been patched so
> that it now checks the SD card first then eMMC? (Evidence would strongly
> suggest this is the case J ), irrespective of boot-switch …
>
>
>
> i.e. we’ve got something like this (obviously assumes a recently flashed
> board)
>
>
>
> Power => eMMC MLO => eMMC u-boot
>
> If (sdcard)
>
> Load image+dtb from sd/boot
>
> Else
>
> Load image+dtb from emmc/boot
if (sdcard)
if ((partition 1)/uEnv.txt && uenvcmd != "")
run uenvccmd (aka old eMMC mode..)
fi
if ((partition 1) /boot.scr)
run boot.scr
fi
if ((partition 1) /boot/boot.scr)
run /boot/boot.scr
fi
for ( 1 -> 7)
if ((partition x) /boot/uEnv.txt && uname_r != NULL)
uname_boot
fi
else if (eMMC)
if ((partition 1)/uEnv.txt && uenvcmd != "")
run uenvccmd (aka old eMMC mode..)
fi
if ((partition 1) /boot.scr)
run boot.scr
fi
if ((partition 1) /boot/boot.scr)
run /boot/boot.scr
fi
for ( 1 -> 7)
if ((partition x) /boot/uEnv.txt && uname_r != NULL)
uname_boot
fi
else
u-boot ums mode... (eMMC is shared as /dev/sdX on pc over usb)
fi
> Which leads me to 1 other point: presumably u-boot is still set to look for
> /boot on the 2nd partition which is why we are still all formatting SD cards
> with a little bit of FAT32?
the "only" reason it's fat16, is for windows users to copy files from
the 100Mb "fat" partition. Right now it serves "no" other purpose..
Regards,
--
Robert Nelson
https://rcn-ee.com/
--
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