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Altera_Forum
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11 years ago

Getting Qsys to allocate space for an exported BAR

I’m using Qsys flow to implement a Avalon MM pcie interface. The interface I need is both a target and an initiator. The target functions are for the configuration registers of my IP code, just sim...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

okay, so it turns out that you cannot export the Rxm_BAR0 (even though Qsys allows you to, grrrrrrrr). Qsys needs to see something bolted to the BAR interface before it will allow any allocation of BAR memory space. So if you just export the BAR, Qsys says meah, he does not need any space. You need to connect an Avalon-MM pipelined bridge to Rxm_BARn in Qsys. Then export the Avalon master side of the bridge.