LayerscapeのトピックRe: Boot LS 1012A (FRDM) from USB

Boot LS 1012A (FRDM) from USB

pieterdewachter — Mon, 05 Mar 2018 10:09:39 GMT

I have currently compiled the QorIQ SDK (update 1703) for the (LS1012A FRDM) board, more specifically fsl-image-full and fsl-image-kernelitb. This gives me some u-boot, rcw, kernel and rootfs files / images. Now I would like to boot this extended Linux (the full image) from a USB drive. Unfortunately I'm not sure as of how to setup the environment correctly to achieve this.

The USB drive is recognized correctly in both the U-boot bootloader and the Linux that came preinstalled on the board. Some debug info:

=> usb storage
Device 0: Vendor: Intenso Rev: 1.00 Prod: Speed Line
Type: Removable Hard Disk
Capacity: 15237.1 MB = 14.8 GB (31205621 x 512)

=> usb part

Partition Map for USB device 0 -- Partition Type: DOS

Part Start Sector Num Sectors UUID Type
1 32 31205344 0005d59e-01 83

=> usb dev

USB device 0: Vendor: Intenso Rev: 1.00 Prod: Speed Line
Type: Removable Hard Disk
Capacity: 15237.1 MB = 14.8 GB (31205621 x 512)

The drive has been formatted as ext2 and I put all the files of the rootfs archive (extracted it) and the kernel-fsl-ls1012a-frdm.itb file on it.

Thanks in advance!

Re: Boot LS 1012A (FRDM) from USB

Pavel — Tue, 06 Mar 2018 06:01:24 GMT

Look at the Section 4.4.9.5.3 of SDK 2.0-1703 documentation about "Deploying the full file system":

https://www.nxp.com/docs/en/supporting-information/QORIQ-SDK-2.0-IC-REV0.pdf

Have a great day,
Pavel Chubakov

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Re: Boot LS 1012A (FRDM) from USB

zmlopez — Wed, 07 Mar 2018 09:07:33 GMT

I've already done it, but with dtb and kernel files instead of itb:

(I'm using OpenWRT distribution instead of Yocto)

Two partitions in the usb drive, made with gparted in linux.

First one, a small FAT partition, second an ext4 file system.

In the first one, I've put the following files:

image-fsl-ls1012a-frdm.dtb

ls1012afrdm-kernel.bin

In the second partition, the linux file system.

Uboot commands:

usb start
fatload usb 0:1 90000000 image-fsl-ls1012a-frdm.dtb

fatload usb 0:1 96000000 ls1012afrdm-kernel.bin
setenv bootargs "console=${console},${baudrate} root=/dev/sda2 rootwait rw"
bootm 96000000 - 90000000

In your case, this should work, if the itb file is in root of usb drive:

usb start
ext2load usb 0:1 90000000 kernel-fsl-ls1012a-frdm.itb
setenv bootargs "console=${console},${baudrate} root=/dev/sda1 rootwait rw"
bootm 90000000

Hope this helps.

Re: Boot LS 1012A (FRDM) from USB

pieterdewachter — Thu, 08 Mar 2018 09:21:13 GMT

Thank you for the advice, unfortunately I keep getting this message when performing the steps described in that section:

ERROR: can't get kernel image!

Re: Boot LS 1012A (FRDM) from USB

pieterdewachter — Thu, 08 Mar 2018 09:22:44 GMT

I tried to follow these steps, but it seems like I am missing some files to do so correctly. I only have an image .bin file so I used that one instead, without luck unfortunately. The files I have are listed on this screenshot:

Re: Boot LS 1012A (FRDM) from USB

zmlopez — Mon, 12 Mar 2018 11:34:17 GMT

You need uImage format, not Image, to load it with bootm in u-boot (or zImage if you use bootz).

uImage has a wrapper to tell u-boot how to load the binary file, created with mkimage.

Have you tried with the itb file?

usb start
ext2load usb 0:1 90000000 kernel-fsl-ls1012a-frdm.itb
setenv bootargs "console=${console},${baudrate} root=/dev/sda1 rootwait rw"
bootm 90000000

I can't test it myself rigth now, because I don't have an itb file generated in my system.