topic Re: Boot Using SD Card in i.MX Processors

Boot Using SD Card

Nirjul_Patel — Tue, 04 Jan 2022 04:37:04 GMT

Hello,

I Am Using Following Step And Generate Image

Image List:-

I Want To Boot A Board Using SD Card So, What Image File should i Use?

Re: Boot Using SD Card

Yuri — Tue, 04 Jan 2022 06:37:48 GMT

@Nirjul_Patel
Hello,

According to section 4.1.1 (Bootloader) of “IMX_LINUX_USERS_GUIDE.pdf”:

The pre-built or Yocto project default bootloader names start with the name of the bootloader followed by the name of the platform and board and followed by the name of the device that this image is configured to boot from: u-boot-[platform][board]_[machine_configuration].bin. If no boot device is specified, it boots from SD/MMC.

On i.MX 8, the U-Boot cannot boot the device by itself. The i.MX 8 pre-built images or Yocto Project default bootloader is imx-boot for the SD card, which is created by the imx-mkimage.

On i.MX 8M SoC, the second program loader (SPL) is enabled in U-Boot. SPL is implemented as the first-level bootloader running on TCML (For i.MX 8M Nano and i.MX 8M Plus, the first-level bootloader runs in OCRAM).

https://www.nxp.com/docs/en/user-guide/IMX_LINUX_USERS_GUIDE.pdf

Summary Page:

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX

UUU is recommended for system deployment; for the recent Linux NXP BSP:

# This command will be run when i.MX6/7 i.MX8MM, i.MX8MQ

SDP: boot -f imx-boot-imx8mmevk-sd.bin-flash_evk

Regards,
Yuri.

Re: Boot Using SD Card

Nirjul_Patel — Tue, 04 Jan 2022 07:42:43 GMT

Hello,

How To i.MX 8M SoC, the second program loader (SPL) is enabled in U-Boot?

I Mean Any Configuration Require In local.conf or other file

Secound Quation Is I Want To .sdcard or .wic.gz file then Any Configuration change or Add in Machine configuration and local.conf File

Re: Boot Using SD Card

Yuri — Wed, 05 Jan 2022 07:03:03 GMT

@Nirjul_Patel
Hello,

the SPL is default U-boot configuration option for i.MX8M.

Use Chapter 3 (Porting U-Boot) of "i.MX Porting Guide" how to build new
U-boot.

Generally customers can just to re-write new U-boot in SD card (.wic)
image. To burn the boot image to the SD card, execute the following command:

dd if=<boot_image> of=/dev/sd<x> bs=1k seek=<offset> conv=fsync

offset is: 33 - for i.MX 8M Quad, i.MX 8M Mini.

Regards,
Yuri.

Re: Boot Using SD Card

Nirjul_Patel — Wed, 05 Jan 2022 09:42:38 GMT

I Using iMX8mm Board, So $ make mx6ull_14x14_evk_defconfig This Command Is Change Or Not ?
If Change So which Command i used?

$ cd uboot-imx
$ make distclean
$ make mx6ull_14x14_evk_defconfig
$ make

Re: Boot Using SD Card

Yuri — Fri, 07 Jan 2022 06:39:16 GMT

@Nirjul_Patel
Hello,

hardly it is good idea to use i.MX 6ULL configuration for i.MX8Mm.

Regards,
Yuri.