pcie initialization with acpi

[hilfi alkaff]

Hi,

I would like to learn more of the above matter. After the MCFG table gets
discovered with acpi, what does the address given by the
ACPI_MCFG_ALLOCATION* tells you? Does that tell you the address of the
extended configuration space of pci express?

Also, is BSD distinguishing between reading from pcie config & pci config?
Because there's this pciereg_cfgread() function that seem to do that. I
thought pcie config space is just at the offset of 0x100 from pci config
space?

-- 
Thanks in advance,
~Hilfi Alkaff~