boot MX6Q SABRESD

[xiaoqiangyang]

Hi everyone,

I am working on MX6Q SABRESD board,and I have copied u-boot,uImage(use dd command) and rootfs to a SD card and started successfully.

Now I've rebuilt the linux kernel and copyed new image to my SD card(dd if=uImage of=/dev/sdb bs=512 seek=2048 conv=fsync),

but after I started linux,I found the kernel is the old(uname -a).Why?

Besides, I can run the Image both from MMC/SD and NFS. How can I boot use tftpboot(kernel on tftp server) and rootfs on MMC/SD?

Thanks in advance!

Xiaoqiang

[VladanJovanovic]

Have you verified you've used updated version of uImage (and that it was really rebuilt?)?

You can boot kernel from tftp and rootfs on MMC/SD. Just configure U-Boot to use TFTP to load kernel (check boot script) and, using bootargs variable in U-Boot make sure root filesystem is mounted from SD card, not from NFS.

[leiwang111]

Hi Valadan,

As you mentioned in your post, what need to be done to boot kernel from tftp and using the rootfs on MMC/SD.

It seems that all the instructions are pointing to using tftp for the uImage and NFS for the Android filesystem. I am working on developing driver for the Kernel. It is less efficient to load the rootfs from the NFS. I only need to work with the uImage.

FYI, my configuration is:

1. MCIMX6Q-SDB (Sabre SD board)

2. HDMI display

3. Freescale pre-build JB4.3

4. Mouse thru a USB hub to the OTG/Host port.

Thanks,

Lei

[xiaoqiangyang]

Hi Vladan,

Thanks for your reply,I have found the reason,my bootargs variable have a mistake, I used 'mmc dev 3',so it boot from eMMC but nod SD card. I changed it to 'mmc dev 2' and fixed it.

I did as you said,  useing 'tftp uImage;run bootcmd_mmc' and succeedded.