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SubjectRe: PCI memory allocation bug with CONFIG_HIGHMEM


On Wed, 7 Jan 2004, Dave Jones wrote:
>
> But PNPBIOS is an ISA relic isn't it ?

It still shows up. BIOSes use it exactly to tell the system about reserved
magic IO regions (like the IO registers that are reserved for ACPI).

ISA may be gone, but the crap it left behind lingers on. The BIOS writers
know that they can affect windows IO region allocation with it, so they
still do - to make sure windows boots even when the hardware has some
strange IO resource allocations.

And yes, that is likely to be an issue on x86-64 too.. As far as windows
is concerned, it's just another 32-bit CPU.

Linus
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