Read Barebox Infos from Linux

Read Barebox Infos from Linux

[Michael Graichen]

Hey, 

I was just wondering if it is possibe to read the Barebox log messages or the Barebox version from within Linux?

Best regards
Michael
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Re: Read Barebox Infos from Linux

[Ahmad Fatoum]

Hi Michael,

On 21.02.22 14:04, Michael Graichen wrote:
> Hey, 
> 
> I was just wondering if it is possibe to read the Barebox log messages or the Barebox version from within Linux?

That's what CONFIG_FS_PSTORE_CONSOLE does, see
https://www.barebox.org/doc/latest/filesystems/pstore.html

> Barebox version from within Linux?

Yes, check out /proc/device-tree/chosen/barebox-version

If you are curious what else barebox is fixing up into the device tree,
try of_diff - +

This will apply all DT fixups to a copy of the barebox device tree and
show a diff before and after, e.g.

chosen {
+       barebox-version = "barebox-2021.05.0-20220126-2";
+       bootargs = "console=ttymxc1,115200n8";
+       reset-source = "POR";
+       reset-source-instance = <0x0>;
+       bootsource = "/soc/bus@2100000/mmc@2198000";
};

Cheers,
Ahmad


> 
> Best regards
> Michael
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 


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Re: Read Barebox Infos from Linux

[Sascha Hauer]

Hi Michael,

On Mon, Feb 21, 2022 at 01:04:33PM +0000, Michael Graichen wrote:
> Hey, 
> 
> I was just wondering if it is possibe to read the Barebox log messages or the Barebox version from within Linux?

Yes. See https://www.barebox.org/doc/latest/filesystems/pstore.html

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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AW: Read Barebox Infos from Linux

[Michael Graichen]

Hey Ahmed and Sascha, 

Thanks for your reply. 

This is all meant to work with devicetree support. Not x86/efi systems?

Best regards 
Michael 


________________________________________
Von: Ahmad Fatoum <a.fatoum@pengutronix.de>
Gesendet: Montag, 21. Februar 2022 14:59
An: Michael Graichen; barebox@lists.infradead.org
Betreff: Re: Read Barebox Infos from Linux

Hi Michael,

On 21.02.22 14:04, Michael Graichen wrote:
> Hey,
>
> I was just wondering if it is possibe to read the Barebox log messages or the Barebox version from within Linux?

That's what CONFIG_FS_PSTORE_CONSOLE does, see
https://www.barebox.org/doc/latest/filesystems/pstore.html

> Barebox version from within Linux?

Yes, check out /proc/device-tree/chosen/barebox-version

If you are curious what else barebox is fixing up into the device tree,
try of_diff - +

This will apply all DT fixups to a copy of the barebox device tree and
show a diff before and after, e.g.

chosen {
+       barebox-version = "barebox-2021.05.0-20220126-2";
+       bootargs = "console=ttymxc1,115200n8";
+       reset-source = "POR";
+       reset-source-instance = <0x0>;
+       bootsource = "/soc/bus@2100000/mmc@2198000";
};

Cheers,
Ahmad


>
> Best regards
> Michael
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
>


--
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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http://lists.infradead.org/mailman/listinfo/barebox

Re: Read Barebox Infos from Linux

[Sascha Hauer]

On Tue, Feb 22, 2022 at 11:57:59AM +0000, Michael Graichen wrote:
> Hey Ahmed and Sascha, 
> 
> Thanks for your reply. 
> 
> This is all meant to work with devicetree support. Not x86/efi systems?

The place where pstore lives can also be described on the kernel command line,
so I think it should work there as well. I don't know how to pick a
suitable memory address though on x86/efi. The initial pstore support in
the kernel is from Intel, so I think it really should work on these
systems. Whether the all the necessary pieces are also in barebox is
another topic :)

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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