Layerscape中的主题 Re: Boot problem with PBI

Boot problem with PBI

notshure — Mon, 04 Oct 2021 10:10:59 GMT

Hello everyone.

My goal is to get my LS1043a board to boot by SD and starting the system by shutting down cores 1, 2 and 3.

Once the system is up and running, i would like to see from uboot that such cores are disabled.

To do this I have to create a custom boot via flexbuilder.

The procedure I performed is the following:

Change the file rcw_1600_sdboot.rcw, with the addition of the PBI command.
Save the file rcw_1600_sdboot.rcw with the new changes.
Delete the old compiled RCW file rcw_1600_sdboot.bin from the folder located in :

/home/flex/Downloads/flexbuild_lsdk2108/components/firmware/rcw/ls1043ardb/RR_FQPP_1455

Go to the folder:

/home/flex/Downloads/flexbuild_lsdk2108/components/firmware/rcw

And run the linux $ make command, to compile all the RCWs

Delete any folders present in the following path:

/home/flex/Downloads/flexbuild_lsdk2108/build/firmware/rcw

Delete any folders present in the following path:

/home/flex/Downloads/flexbuild_lsdk2108/build/firmware/atf

Delete any files or folders present in the following path:

/home/flex/Downloads/flexbuild_lsdk2108/build/images

Once the old executable files are deleted, I run the following command:

flex-builder -i mkfw -m ls1043ardb-b sd

The output of the command generates me the following files:

firmware_ls1043ardb_sdboot.img
firmware_ls1043ardb_sdboot_secure.img
linux_LS_arm64_signature.itb
lsdk2108_yocto_tiny_LS_arm64.itb
rootfs_lsdk2108_yocto_tiny_arm64.cpio.gz

I write the file firmware_ls1043ardb_sdboot.img to the SD card using the following linux command:

sudo dd if=firmware_ls1043ardb_sdboot.img of=/dev/sdb1 bs=512 seek=8

I use a USB adapter to insert SD card into my PC.

I am running Ubuntu 20.04 through a virtual machine.

The writing seems to have been successful.

But when I try to boot from SD (set de DIP switches for SD boot), I don't see anything on the console.

I don't see Uboot starting.

there is something wrong with this procedure ?

Below is the link to the drive folder in which there are all the .bin files of interest and the modified RCW file

File

Re: Boot problem with PBI

ufedor — Mon, 04 Oct 2021 19:06:07 GMT

Are you able to prepare bootable SD card if unmodified rcw_1600_sdboot.rcw is used?

Re: Boot problem with PBI

notshure — Tue, 05 Oct 2021 06:42:52 GMT

Yes, I can generate a working SD boot in case I don't modify rcw_1600_sdboot.rcw.

Re: Boot problem with PBI

ufedor — Tue, 05 Oct 2021 07:33:22 GMT

Please correct the line:

write 0x01ee0094, 0x0000000e

as follows

write 0xee0094, 0x0000000e

Re: Boot problem with PBI

notshure — Thu, 07 Oct 2021 09:00:14 GMT

Thank you for your answer.
Now the boot starts and I can see u-boot.
To be sure the cores have been disabled, I went to read the contents of the DCFG CCSR COREDISR register by running the following command on u-boot

md 0x1ee0094 1

But I read the following value 0x0e000000

I shouldn't be reading 0x0000000e

Re: Boot problem with PBI

ufedor — Thu, 07 Oct 2021 16:58:39 GMT

U-Boot is natively big-endian, so for little-endian registers it is needed to perform byte swap.

Re: Boot problem with PBI

notshure — Fri, 08 Oct 2021 07:54:33 GMT

Thanks a lot for the answer.