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Altera_Forum's avatar
Altera_Forum
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9 years ago

PCIe IO BAR's limited to "Legacy Endpoints"

I am looking to define an EP with a BAR defined as IO instead of memory inorder to test the IO / CNFG PCI ordering rules . I thought it would be as easy as going into an existing design and r...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

IO style endpoints aren't really supported in PCIe. They only exist so that legacy PCI cards can be attached via a PCIe to PCI bridge. I wouldn't be at all surprised to find out they don't work. I wouldn't be upset about it either. It's basically legacy garbage that should be ignored in a modern design.