Re: [seL4] i.MX6 quad booting problems

That wasn't the problem, but I've managed to sort it out - for anyone else that has a similar problem, my microSD card is a bit wonky and needed a few attempts at reformatting and re-copying u-boot.bin from recovery mode. Thanks for all your help, Alex. - Will On 25 December 2014 at 11:36, Alexander Kroh wrote:

Hi Will,

This is the correct u-boot.bin: https://sel4.systems/Hardware/sabreLite/u-boot.bin

This prebuilt u-boot has a patch applied in order to compile in the "bootelf" command. Perhaps you did not install u-boot correctly or you are not booting from the correct source? In any case, the "bootelf" command is not strictly required to boot seL4.

To boot a binary image, first convert your elf file into a binary file: $> arm-linux-gnueabi-objcopy --output-target binary bootimg.elf bootimg.bin

This strips out the image metadata (load address and entry point) so you need to be sure to use the correct addresses in your boot command U-Boot> tftpboot 0x20000000 bootimg.bin && go 0x20000000

- Alex

________________________________________ From: Will Korteland [will.korteland@gmail.com] Sent: Wednesday, 24 December 2014 01:54 To: Alexander Kroh Cc: devel@sel4.systems Subject: Re: [seL4] i.MX6 quad booting problems

Hi Alex,

I've managed to get the TFTP part working (it was a combination of many problems - environment variables, drivers, leftover config from AOS, etc.), but I now have a different problem - after the TFTP finishes, I get the message "Unknown command 'bootelf'". From what I've read, this doesn't seem to be an environment variable, but needs to be compiled into the u-boot image - did I download the right u-boot.bin from the website? I used the prebuilt u-boot.bin from the Sabre Lite hardware page.

(If I'm wrong and it's an environment variable, could you please paste it here?)

Thanks, - Will

On 14 December 2014 at 20:15, Alexander Kroh mailto:Alexander.Kroh@nicta.com.au> wrote: Hi Will,

The key environment variables are:

bootcmd=tftpboot 0x30000000 bootimg.elf && bootelf gatewayip=192.168.168.1 ipaddr=192.168.168.2 serverip=192.168.168.1

The tftpboot command reports the IP addresses used so that you can check that they are correct.

You might consider using tcpdump or wireshark to diagnose the problem.

- Alex

________________________________________ From: Devel [devel-bounces@sel4.systems] on behalf of Will Korteland [ will.korteland@gmail.commailto:will.korteland@gmail.com] Sent: Sunday, 14 December 2014 18:26 To: devel@sel4.systems Subject: [seL4] i.MX6 quad booting problems

Hi everyone,

I hope I'm using the correct list for this type of thing... I've bought my own Sabre Lite (identical to the AOS boards), and I've been trying for a few days now to get it to boot from tftp. I've downloaded the prebuilt u-boot.bin from the Sabre Lite hardware page, but it still doesn't seem to be working - it keeps timing out when trying to do the transfer. I think my tftp server is set up correctly, since it is the same as it was during AOS last semester.

Could someone please boot a Sabre Lite set up for TFTP, interrupt the default boot process, type "printenv" into the U-Boot prompt and paste the results?

Sorry if this is the wrong place to ask.

Thanks, - Will

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