Re: NXP Layerscape

On 10.06.21 18:23, Barbier, Renaud wrote:

Could the barebox image be started from memory with a "go" command?
What would be the entry point?

Here's the barebox code that implements booting other barebox images:
https://git.pengutronix.de/cgit/barebox/tree/arch/arm/mach-layerscape/pblimage.c

Apparently entry point is at offset 128K. Keep in mind that
U-Boot go (at least on ARM32) does not do cache maintenance or turn
off the MMU, so funny effects may be expected.

Cheers,
Ahamd

-----Original Message-----
From: Ahmad Fatoum <a.fatoum@pengutronix.de> 
Sent: 10 June 2021 17:14
To: Barbier, Renaud <redacted>
Subject: Re: NXP Layerscape



[**EXTERNAL SOURCE**]:Please verify the source before clicking link or opening attachment.

Hi Renaud,

(please keep mailing list CC'd)

On 10.06.21 16:53, Barbier, Renaud wrote:

quoted

 I am not using a USB serial adapter. Currently I have a RJ-45 to RS232 to my laptop.

Should not BOOTLOCPTR be set I the PBI. I see 0x40100000 for U-boot and 0x10000000 for barebox. Unless it does not apply for PPA boot flow.

I don't know about the specifics of the first stage boot on the Layerscape, I just wanted to point you at the docs and ask if the steps I had documented there work for you or not.

Cheers,
Ahmad

quoted

-----Original Message-----
From: Ahmad Fatoum <a.fatoum@pengutronix.de>
Sent: 10 June 2021 15:09
To: Barbier, Renaud <redacted>; Barebox List 
[off-list ref]
Subject: Re: NXP Layerscape



[**EXTERNAL SOURCE**]:Please verify the source before clicking link or opening attachment.

Hello Barbier,

On 10.06.21 15:49, Barbier, Renaud wrote:

quoted

I received a NXP  LS1046A-RDB

It doesn't reboot cleanly with a USB serial adapter attached!
Jfyi, gave me a scare first time, when I thought I broke something ^^.

quoted

I built barebox for the LS1046A and got the image barebox-ls1046ardb-qspi.image.
I programmed the image in the alternative SPI bank as per NXP instructions:
=>    tftp $load_addr
=>    sf erase 0 +$filesize && sf write $load_addr 0 $filesize

Barebox does not boot.

I did notice that u-boot is at address 0x40100000 while the RCW is at 0x40000000.
My understanding is that barebox is one image and shall be programmed 
at offset 0 of the SPI (0x40000000)

Can't comment on that. Sascha did the integration.

quoted

At present I cannot connect my I.C.E. due a pin stuck in my MIPI connector.

Any return on experience is welcome.

Can comment on that: Last time I did this, I wrote some documentation:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
barebox.org%2Fdoc%2Flatest%2Fboards%2Flayerscape.html&data=04%7C01
%7Crenaud.barbier%40abaco.com%7C0e00e06c3236419cae1108d92c2acefe%7Ce6f
27451899d4d0db8fa88baafa551a7%7C0%7C0%7C637589384654589155%7CUnknown%7
CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXV
CI6Mn0%3D%7C1000&sdata=OUk8SFTmrlH0U%2F8aiXZonQHxLplyEjlMtc7Y5JHx%
2BUk%3D&reserved=0

There I flashed barebox from another barebox booted from SD-Card.
I'd assume that should still work. I can't recall how the CPLD needed to be tickled, but it would be helpful to know whether doing it like described in the documentation doesn't work for you.

Cheers,
Ahmad

quoted

Cheers,
Renaud


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