AM6412: EMMC Partition Query

Uthaya kumar

Part Number: AM6412

Hi all,

i have booted the AM6412 EVM using emmc.Now i have u-boot images in mmcblk0boot0 partition and rootfs,kernel images in mmcblk0p1 partiton.

Is there any way to keep u-boot images in mmcblk0p1 partiton and rootfs,kernel in mmcblk0p2 partiton.

while booting from emmc,i have to take u-boot images from mmcblk0p1 partiton and rootfs,kernel from mmcblk0p2 partiton.

Is it able to achieve in am6412 if yes means ,can anyone suggest some steps?

over 2 years ago

0 Hong Guan64 over 2 years ago

TI__Guru 68450 points

Hello,
For most of embedded system with eMMC, the commonly used eMMC usage:
- eMMC boot partition(boot0/boot1): bootloader (i.e. u-boot)
- UDA: rootFS, which can be further partitioned depending on user case, i.e. read-only rootFS, writeable FS etc...
This is the default TI Linux SDK on eMMC boot
software-dl.ti.com/.../UG-Memory.html
Is there specific user case to use UDA for bootloader on your system?
Best,
-Hong

0 Uthaya kumar over 2 years ago in reply to Hong Guan64

Prodigy 220 points

Hi Hong

i want to achieve multibooting from linux prompt,In this case i need this kind of approach,Is it possible to do ?

0 Hong Guan64 over 2 years ago in reply to Uthaya kumar

TI__Guru 68450 points

Hello,
It is doable to boot from UDA, but there're extra work you'll need to do...
- partition UDA, i.e. partition#1 (i.e. FAT) for u-boot binary, partition#2 for rootFS...
- configure BOOTMODE pins to have ROM load tiboot3.bin
- modify as needed to have R5-SPL load A53 u-boot binaries (tispl.bin, u-boot.img)...
- ...
Best,
-Hong

0 Uthaya kumar over 2 years ago in reply to Hong Guan64

Prodigy 220 points

hi hong

configure BOOTMODE pins to have ROM load tiboot3.bin
modify as needed to have R5-SPL load A53 u-boot binaries (tispl.bin, u-boot.img)

How do achieve this two configurations ? Can you suggest some steps.

0 Hong Guan64 over 2 years ago in reply to Uthaya kumar

TI__Guru 68450 points

Uthaya kumar said:
configure BOOTMODE pins to have ROM load tiboot3.bin

refer to <4.4.4 eMMC Boot> in AM64x TRM on BOOTMODE pins setup in order for ROM to load tiboot3.bin from eMMC UDA (raw or FS)

Uthaya kumar said:
modify as needed to have R5-SPL load A53 u-boot binaries (tispl.bin, u-boot.img)

look into u-boot files you'll need to modify as necessary, i.e.
git.ti.com/.../am642_init.c
git.ti.com/.../spl_mmc.c

Best,
-Hong

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AM6412: EMMC Partition Query