Mr Nelson,
Thank you very much! When I finally saw that Kernel booting, it was more
beautiful than a sunset by the ocean.
I intend to looking into the options as far as getting the UUID going;
however for the moment I used your "option 1" and forced the board to boot
from the MMC. I searched around for quite a while trying to find a "force
root" command for u-boot, but finally understood that you meant that more
figuratively. I modified uEnv.txt like this, and it works.. i just
specified device 1 rather than variables. I will try the other option later
down the road. I think I may have changed it more than I needed to, but it
does work. Thanks again!!
mmcpart=2
optargs=fixrtc capemgr.enable_partno=BB-UART2,BB-UART4
uenvcmd=i2c mw 0x24 1 0x3e; kd=0; if test $mmcdev -eq 1; then mmc dev 1; if
mmc rescan; then kd=1; fi; mmc dev 1; fi; setenv mmcroot
/dev/mmcblk0p${mmcpart}
ro
loadfdt=load mmc 1:${mmcpart} ${fdtaddr} ${bootdir}/dtbs/${fdtfile}
loadimage=load mmc 1:${mmcpart} ${loadaddr} ${bootdir}/${bootfile}
optargs=quiet drm.debug=7 capemgr.enable_partno=BB-I2C1
On Thu, Oct 8, 2015 at 6:00 PM, Robert Nelson <[email protected]>
wrote:
> On Thu, Oct 8, 2015 at 6:44 PM, Chris R <[email protected]>
> wrote:
> > "aka, use an uuid/initramfs when you want to use the eMMC as rootfs
> > without the microSD card plugged,"
> >
> >>
> >> So, and I thank you for your patience- I am in the situation here where
> I
> >> am booted from my MMC, (sd card is not in the machine). My BB is booted
> up
> >> and happy. I want to copy my new u-boot.img file into partition 1, so
> as to
> >> dispense with auto-boot. I know that if I just copy it now, it will,
> upon
> >> reboot, not mount the mmc root filesystem, like it does now.
>
> Your other option, force root=mmcblk0p1 (but then it won't work if
> your microSD is plugged in)
>
> >> So I must first generate an initramfs? I did try update-initramfs -u,
> and
> >> that does nothing- no messages, etc... I tried update-initramfs -c, but
> that
> >> just tells me how to use initramfs.
>
> sudo update-initramfs -ck `uname -r`
>
> >> Or do you mean I have to configure u-boot or uEnv.txt to use an
> initramfs?
> >> Sorry, I am quite new to this, and thanks.
>
> You'll also have to configure u-boot to load the generated
> initrd.img-`uname -r` as that's what is going ot decode the "uuid =
> /dev/mmblkXyZ"...
>
> you can use:
>
> ls -lh /dev/disk/by-uuid/*
>
> to find the uuid of the eMMC partition...
>
> Regards,
>
> --
> Robert Nelson
> https://rcn-ee.com/
>
> --
> For more options, visit http://beagleboard.org/discuss
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