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Questions about expansion rom of 6solox pcie ep

Question asked by Jin Hua on Mar 8, 2017
Latest reply on Mar 13, 2017 by Jin Hua

Hi ,

   We use 6solox as a pcie ep connected to a x86 board. On the x86 board, we can find 64k memory space used for 

expansion rom in the pcie configuration space, offset 0x30. Here are my questions:

   Q1: Is it useful or useless about the expansion rom space?

   Q2: Is there any way to disable the rom space ? Not only clear the enable bit, but return all 0s after writing 0xFFFFFFFE to the PCIE_EP_EROMBAR field(Now a value of 0xFFFF0000 returns, that stands for 64KB).

   Thanks very much!