Failed to boot from SD card

[takumishimada]

Hello

According to this documents Freescale Technical Information Center, I tried to boot the kernel from SD card.

But the boot is failed because there is no command "ext2load".

I use the pre-installed U-boot(2014.01-00632-gf891181).

Regards

Shimada

[Pavel]

It looks like that u-boot on your board is too old. Load the latest version of the u-boot for your board.

Freescale offers the latest Linux SDK 1.7 for QorIQ processors:

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=SDKLINUX&fsrch=1&sr=1&pageNum=1#

This SDK contains source files for image building and built images for different boards.

Load u-boot from this SDK to your board.

Freescale Technical Information Center contains list instructions for programming a new u-boot:

  http://www.freescale.com/infocenter/index.jsp?topic=%2FQORIQSDK%2F6332565.html

[takumishimada]

Thank you.

Using u-boot from SDK 1.7, the board can execute "ext2load".

But there is another program.

Although I copied the uImage.dtb in the SD card, the board cannot load the dtb file.

I sent the command `ext2load mmc 0:2 $fdtaddr /boot/uImage.dtb`, but the board said "** File not found uImage **".

I also tried to download the dtb file using tftp, but loading failed to timeout, despite using the same configuration in the pre-installed u-boot.

[Pavel]

See below command sequence for the MPC8308 board. Use similar command sequence for your board.

1. 1. Set the following variables in the u-boot:

setenv mmcargs "setenv bootargs root=/dev/mmcblk0p1 rootwait rw console=$consoledev,$baudrate $othbootargs;mmcinfo"

setenv mmcload_uImage "ext2load mmc 0:1 $loadaddr /boot/uImage"

setenv mmcload_dtb "ext2load mmc 0:1 $fdtaddr /boot/mpc8308erdb.dtb"

setenv mmcboot "run mmcargs;run mmcload_uImage;run mmcload_dtb;bootm $loadaddr - $fdtaddr"

1. 2. Copy rootfs folder to the SD card (command: sudo cp –af “source” “destination”).

1. 3. run Linux using the following command on the MPC8308 board:

run mmcboot

[takumishimada]

I tried it, but same state.

The console output is as follow:

=> setenv mmcargs "setenv bootargs root=/dev/mmcblk0p2 rootwait rw console=$consoledev,$baudrate $othbootargs;mmcinfo"

=> setenv mmcload_uImage "ext2load mmc 0:2 $loadaddr /boot/uImage"

=> setenv mmcload_dtb "ext2load mmc 0:2 $fdtaddr /boot/uImage.dtb"

=> setenv mmcboot "run mmcargs;run mmcload_uImage;run mmcload_dtb;bootm $loadaddr - $fdtaddr"

=> saveenv

Saving Environment to Flash...

Un-Protected 1 sectors

Erasing Flash...

. done

Erased 1 sectors

Writing to Flash... 9....8....7....6....5....4....3....2....1....done

Protected 1 sectors

=> run mmcboot

Device: FSL_SDHC

Manufacturer ID: 74

OEM: 4a45

Name: SDC 

Tran Speed: 50000000

Rd Block Len: 512

SD version 3.0

High Capacity: Yes

Capacity: 14.7 GiB

Bus Width: 4-bit

3079896 bytes read in 279 ms (10.5 MiB/s)

** File not found uImage **

## Booting kernel from Legacy Image at 82000000 ...

  Image Name: Linux-3.12.19-rt30+ls1+g6619b8b

  Image Type: ARM Linux Kernel Image (uncompressed)

  Data Size: 3079832 Bytes = 2.9 MiB

  Load Address: 80008000

  Entry Point: 80008000

  Verifying Checksum ... OK

  Loading Kernel Image ... OK

Starting kernel ...