[edk2-devel] Question about PCD and FW_BASE_ADDRESS

Boeuf, Sebastien sebastien.boeuf at intel.com
Mon May 9 09:42:23 UTC 2022


Hi,

I have a question related to the MMIO accesses performed by OVMF that I
can see are happening whenever PcdGet() is invoked. Could you tell me
how PCD works that can explain why I can see some MMIO read accesses on
address 0xFFFD5A24?

Also, I'm using the CloudHv target, meaning it's loaded as a PVH ELF
binary, and therefore it's not loaded at address 0xFFC00000. Instead
it's loaded at address 0x4FFFD0. I did modify the FW_BASE_ADDRESS in
OvmfPkgDefines.fdf.inc but I'm not sure that's the correct approach.
What do you think about it?

Thanks,
Sebastien
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