AM5718: Where is the load address of uEnv.txt when flashing eMMC.

SY Yoon

Genius 3381 points

Part Number: AM5718

Hi,

I have a question about updating eMMC.

Doesn't uEnv.txt file need for booting MLO and u-boot?

Below guide doesn't include how to write uEnv.txt.

U-Boot # mmc dev 0
U-Boot # mmc rescan
U-Boot # mmc dev 1
U-Boot # fatload mmc 0 ${loadaddr} MLO
U-Boot # mmc write ${loadaddr} 0x100 0x100
U-Boot # mmc write ${loadaddr} 0x200 0x100
U-Boot # fatload mmc 0 ${loadaddr} u-boot.img
U-Boot # mmc write ${loadaddr} 0x300 0x400
U-Boot # fatload mmc 0 ${loadaddr} rootfs.ext4
U-Boot # mmc write ${loadaddr} 0x1000 ...rootfs.ext4 size in bytes divided by 512, in hex...

I want to store uEnv.txt in eMMC.

Where should uEnv.txt be written?

Does U-Boot save u-boot environment information in eMMC?

over 5 years ago

0 Keerthy J over 5 years ago

TI__Guru**** 163630 points

Hi,

Please refer the below thread for saveenv on latest u-boot:
https://e2e.ti.com/support/processors/f/791/t/913291

uenv.txt is used for MMC-SD.

You can simply enable saving env in eMMC.refering the above thread.

Let me know if you are able to saveenv in eMMC.

Best Regards,
Keerthy

0 SY Yoon over 5 years ago in reply to Keerthy J

Genius 3381 points

I already enabled saving env in emmc.

Is uEnv.txt not needed in eMMC booting?

If enabled saving env, where is it saved?

0 Keerthy J over 5 years ago in reply to SY Yoon

TI__Guru**** 163630 points

Hi,

If you are able to save environment in eMMC then all your environment
variables will be stored in eMMC once you give saveenv command in u-boot.
You can save all the boot command and bootargs in eMMC itself so there in no
need of uenv.txt.

setenv bootargs (your bootargs should be here)
setenv bootcmd "to your boot comand"
saveenv
boot

Once saveenv step works. You can boot without having to give bootargs in u-boot prompt.

- Keerthy

Processors

Processors forum

AM5718: Where is the load address of uEnv.txt when flashing eMMC.