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Visitor function47
Visitor
273 Views
Registered: ‎05-16-2018

PS Boot Configuration from PL on ZCU102

Hi,

I am new here. I wonder whether there is a way to boot the PS from the PL. I know this sounds dumb. PL is always configured after PS. It seems after configuring PS, the PL logic will automatically be reset.

Just want make sure. Or is there some other trick way to do this. 

Thanks in advance. 

 

Han

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3 Replies
Voyager
Voyager
264 Views
Registered: ‎02-01-2013

Re: PS Boot Configuration from PL on ZCU102

 

Upon power-up, there's nothing in the PL; until the PL gets programmed, it's an ocean of cleared-out configuration bits that provides zero functionality.

So if by "boot the PS" you mean do an initial, power-up boot using the PL somehow, then that's a negative.

If you instead mean 'reboot' the PS (after initially booting using a more conventional method) by downloading an updated image over an interface that's only available through the PL, then that's something you can probably get working.

-Joe G.

 

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Visitor function47
Visitor
185 Views
Registered: ‎05-16-2018

Re: PS Boot Configuration from PL on ZCU102

Thanks, jg! The second one is something that I am thinking about. Could you please elaborate a little bit more about it?

 

Han

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Voyager
Voyager
176 Views
Registered: ‎02-01-2013

Re: PS Boot Configuration from PL on ZCU102

 

The latter situation would be one where your Zynq would normally boot completely from a local medium (QSPI, SD, EMMC, etc.) and then download an updated boot image using a pathway that goes through the PL (e.g., an PSU GEM Ethernet interface that couldn't use MIO resources). That downloaded image would then get committed to the local boot medium, and then the system would initiate a re-boot.

Another situation would be that your initial boot would only program the PL with minimal logic to download a larger image (once again, perhaps just that one Ethernet interface) and the larger downloaded image would then be used to complete the boot and (most likely) re-program the PL.

-Joe G.

 

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