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TKudoh's avatar
TKudoh
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2 years ago

Can I get which SOF page booted from with Remote Update IP?

I am using a multi-SOF page design on Arria10 and Nios II. Can the Nios II firmware get the SOF page (or boot address) of an FPGA design booted using the Remote Update IP (Avalon-MM I/F)? It is suc...
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
2 years ago

Hello,
there are two options,
1. use the limited info that can be read-out from remote update configuration register
2. embed version info to the FPGA image, e.g. version, git hash, app/factory flag and make it readable for Nios
Regards,
Frank

TKudoh's avatar
TKudoh
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2 years ago

Hi, Frank.

Could you tell me more about option 1?

I created the JIC file that has two SOF pages using Quartus Convert programing files tool, and I set the option for boot from page1 (Application side).
Then, I confirmed that page 1 is loaded, or fallback to page 0 if page 1 is broken.

RU_RECONFIG_TRIGGER_CONDITIONS register is set as:

  • When power on reset, the register is set to 0 (even if fallback to page 0).
  • After reconfig from any (not broken)page, the register is set to 4 (reset triggered from logic array).
  • After reconfig from broken page1, the register is set to 1 (CRC Error) and fallback to page 0.

All other registers are set to 0.

I can determine the current page with following method:

  • Set the boot page as 0 when creating JIC file.
  • If RU_RECONFIG_TRIGGER_CONDITIONS is 0, reconfig from page 1.
  • If RU_RECONFIG_TRIGGER_CONDITIONS is 4, current page is 1.
  • If RU_RECONFIG_TRIGGER_CONDITIONS is 1, current page is 0.

But, this method has two problems:

  • It requires long boot time (but it is acceptable).
  • Sometimes I want to switch to page 0 from page1 dynamically, but it is difficult.(Switching is possible, but cannot determine running with page 0, because RU_RECONFIG_TRIGGER_CONDITIONS is 4)

Regards,

Kudoh