> How is the range defined -- is there a way for us to find it? I'd assume
> in the absence of a PCI-ISA or PCI-EISA bridge all I/O port addresses
> belong to PCI. Otherwise the usual rule of "(addr & 0x300) == 0" applies.
> Perhaps with the addition of "(addr & ~0xff) != 0" for safety as junk I/O
> is often not recorded properly in BARs, sigh...
No the low addresses belong to the chipset and motherboard. There is
also magic then for video and IDE legacy port ranges. I suspect your
mips boxen might be a lot cleaner than the PC world.
Alan
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