On Thursday, 21 December 2017 11:00:00 UTC, onio wrote:
>
> HI All,
>
> I have built custom zImage and am335-boneblack.dtb file together with
> u-boot and its associated files.
> The problem I am having is getting u-boot to automatically boot Linux
> kernel image from SD Card using the uEnv.txt file. I have partitioned my SD
> card into 2 part, first partition contains FAT partition while the second
> is an ext4 . The first partition contains the following files
>
> 1. u-boot.img
> 2. MLO
> 3. zImage
> 4. am335x-boneblack.dtb
> 5. uEnv.txt
>
> I am not currently using the second partition as I am using NFS for the
> root files system. I can halt the u-boot boot process which causes it to
> drop to the *u-boot command prompt* at which point I can then enter the
> following commands manually.
>
> - setenv serverip 192.168.1.100
> - setenv ipaddr 192.168.1.101
> - setenv npath /home/onio/rootfs
> - setenv bootargs console=ttyO0,115200 root=/dev/nfs rw
> nfsroot=${serverip}:${npath} ip=${ipaddr}
> - saveenv
> - fatload mmc 0:1 0x80200000 zImage
> - fatload mmc 0:1 0x80f00000 am335x-boneblack.dtb
> - bootz 0x80200000 - 0x80f00000
>
>
> As previously mentioned I can enter the above commands at the u-boot
> prompt and the board would boot to *Linux command prompt.* I want to
> avoid the process of entering this data manually and get u-boot to do the
> loading and booting of the board using the uEnv.txt file. If my
> understanding is correct u-boot should be able to perform this process
> automatically.
>
> Many thanks in advance.
>
> Regards
>
> onio
>
> NB:
> *The "serverip" is the IP address of my development PC and ipaddr is the
> IP address of the beaglebone black. The root file system is located in the
> following path /home/onio/rootfs on the development PC.*
>
>
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