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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