TDA2: Booting from NAND, how to manage the application images

user5312037

Part Number: TDA2

Hello:

For the TDA2-EVM board, it boot from the sdcard with the ext2 file system, for our product which will use the nand for persistent storage. and seem little document introduce how to boot from nand.

My question are:

1. For nand, should we organise the multiple app image based on file system like booting from sd card?

2. <<SBL User Guide>> under ti_components\drivers\pdk_01_09_00_17\packages\ti\boot\sbl_auto\docs\internal , introduce the tiimage file, is that based raw data or file system?

3. if boot from nand, seem the ubifs is the better, consider above, shall we make the multiple app image into an ubifs partition for u-boot to load multiple app images?

4. what's the different between connecting nand to emmc and connecting nand to GPMC?

Thanks very much!

over 5 years ago

0 Sivaraj R3681 over 5 years ago

TI__Expert 4935 points

There is no support for NAND in PDK (RTOS) and there is no plan to use NAND in the future as well. The RTOS SBL supports only MMC, NOR and QSPI boot media. If you need NAND support use need to use Linux driver stack.

0 Rishabh Garg over 5 years ago in reply to Sivaraj R3681

TI__Guru 55685 points

Hi,

In addition to what Sivaraj said, NAND boot is supported for AM335x device: processors.wiki.ti.com/.../AM437x. You can use this as a reference in case you want to develop SBL for NAND boot.

Kindly note that SBL and u-boot are two different boot loaders.
It is not very clear from the question whether you are using linux (i.e. u-boot) or RTOS (i.e. SBL) as both are being referred in the question.

Regards,
Rishabh

0 user5312037 over 5 years ago in reply to Rishabh Garg

Genius 4320 points

Hello Both:

As we'are new to the TDA2xx, maybe the question is not very clear. let me clarify it again.

we'are using TDA2PX as our product, which will use the NAND as the boot media. the A15 will run the linux. the evem demo board use vision SDK and introduce the uboot and booting from the sdcard, so we are looking how we can boot from the NAND.

1. uboot is not SBL, if using SBL, tiimage format must be used for multiple app images?

2. uboot is for linux and SBL for RTOS?

3. for our case, we should use the uboot, and treat multiple app images like files and pack them into a filesystem?

4. the evem board boot from sdcard with ext4 filesystem, and for boot from nand, ubifs is better?

BTW,what's the MLO under boot partition of the sdcard?

0 Rishabh Garg over 5 years ago in reply to user5312037

TI__Guru 55685 points

Hi,

Yes you are correct that uboot is for linux and SBL is for RTOS.
It seems that you are using Processor SDK Linux. Please let me know if this is not the case.
Uboot does not claim NAND flash support for TDA2Px device. However uboot supports NAND boot for TDA2Ex.
You can refer to below commits:
git.ti.com/.../
git.ti.com/.../
git.ti.com/.../

You can also refer to below e2e threads on the same topic:
e2e.ti.com/.../655887
e2e.ti.com/.../2165108

Regards,
Rishabh

0 Rishabh Garg over 5 years ago in reply to user5312037

TI__Guru 55685 points

Hi,

You should also note that TDA2xx, TDA2Px and TDA2Ex belong to the same SoC family but they are different SoCs.

Regards,
Rishabh

0 user5312037 over 5 years ago in reply to Rishabh Garg

Genius 4320 points

Hi Rishabh:
we are using TDA2PHG and use NAND for boot media.

0 Rishabh Garg over 5 years ago in reply to user5312037

TI__Guru 55685 points

Hi,
As explained above you need to implement the NAND boot for TDA2Px. Uboot does not claim NAND flash support for TDA2Px device.
Regards,
Rishabh

0 user5312037 over 5 years ago in reply to Rishabh Garg

Genius 4320 points

Hi Rishabh:
Can give it more details about implement the NAND boot for TDA2Px.
As my understanding, with the linux, only the Uboot is the only way to bring up the kernel.
If the Uboot does not calin NAND flash support for TDA2Px device, should we focus on Uboot, and implement the NAND boot in Uboot?

0 Rishabh Garg over 5 years ago in reply to user5312037

TI__Guru 55685 points

Hi,
Yes Uboot is needed to bring up Kernel.
I have already shared the NAND support git patches for TDA2Ex device.
You should refer to them and implement the same for TDA2Px.
Regards,
Rishabh

0 user5312037 over 5 years ago in reply to Rishabh Garg

Genius 4320 points

Hi Rishabh:
Appreciate so much!

0 Rishabh Garg over 5 years ago in reply to user5312037

TI__Guru 55685 points

Hi,
Glad to help. Kindly mark the post that resolved your query as "This resolved my issue".
Feel free to ask any follow-up questions by creating a new thread.
Regards,
Rishabh

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TDA2: Booting from NAND, how to manage the application images