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PCI Address Decode querry!!!



Hello !!


When PCI Bus 64 bit Bus is it mendatory for all the BARS to be 64 bit??

Or is it like this, for a 32 bit BAR match??

match_occured = (ad[63:32] == 0 ) && (mask[31:12] & ad[31:12] ==
Bar[31:12])

Please give some real Idea on it!!

Best rgds
Narayan