Re: physical memory reservation

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Fri Jan 14 2000 - 12:48:41 EST


> I'm writing a driver for a PCI device, which also has an External I/O
> (XIO) Bus Interface. I need to reserve some memory from the PC 's address
> space to be used by the XIO Interface.

Ok

> How do i find out a 'memory hole' which could be used, & how do i
> 'reserve' this memory range, so that it doesn't get allocated/used by any
> other device?

You put it in your PCI BAR registers and the BIOS will allocate you some PCI
space for it

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